These clauses prevent governments from discriminating against citizens of other states.
There might be more! The State Constitution Tool currently only compares constitutions, but there may be statutes too.
Constitutions
Alabama
That no ex post facto law, nor any law, impairing the obligations of contracts, or making any irrevocable or exclusive grants of special privileges or immunities, shall be passed by the legislature; and every grant or franchise, privilege, or immunity shall forever remain subject to revocation, alteration, or amendment.
Alaska
No bill of attainder or ex post facto law shall be passed. No law impairing the obligation of contracts, and no law making any irrevocable grant of special privileges or immunities shall be passed. No conviction shall work corruption of blood or forfeiture of estate.
Arizona
No law shall be enacted granting to any citizen, class of citizens, or corporation other than municipal, privileges or immunities which, upon the same terms, shall not equally belong to all citizens or corporations.
No hereditary emoluments, privileges, or powers shall be granted or conferred, and no law shall be enacted permitting any perpetuity or entailment in this state.
Arkansas
The equality of all persons before the law is recognized, and shall ever remain inviolate; nor shall any citizen ever be deprived of any right, privilege or immunity; nor exempted from any burden or duty, on account of race, color or previous condition.
The General Assembly shall not grant to any citizen, or class of citizens, privileges or immunities which, upon the same terms, shall not equally belong to all citizens.
California
A citizen or class of citizens may not be granted privileges or immunities not granted on the same terms to all citizens. Privileges or immunities granted by the Legislature may be altered or revoked.
Colorado
No ex post facto law, nor law impairing the obligation of contracts, or retrospective in its operation, or making any irrevocable grant of special privileges, franchises or immunities, shall be passed by the general assembly.
Connecticut
All men when they form a social compact, are equal in rights; and no man or set of men are entitled to exclusive public emoluments or privileges from the community.
Connecticut
No hereditary emoluments, privileges or honors, shall ever be granted, or conferred in this state.
Georgia
All citizens of the United States, resident in this state, are hereby declared citizens of this state; and it shall be the duty of the General Assembly to enact such laws as will protect them in the full enjoyment of the rights, privileges, and immunities due to such citizenship.
Hawaii
No citizen shall be disfranchised, or deprived of any of the rights or privileges secured to other citizens, unless by the law of the land.
Idaho
All political power is inherent in the people. Government is instituted for their equal protection and benefit, and they have the right to alter, reform or abolish the same whenever they may deem it necessary; and no special privileges or immunities shall ever be granted that may not be altered, revoked, or repealed by the legislature.
Illinois
No ex post facto law, or law impairing the obligation of contracts or making an irrevocable grant of special privileges or immunities, shall be passed.
Indiana
The General Assembly shall not grant to any citizen, or class of citizens, privileges or immunities, which, upon the same terms, shall not equally belong to all citizens.
Iowa
All laws of a general nature shall have a uniform operation; the general assembly shall not grant to any citizen, or class of citizens, privileges or immunities, which, upon the same terms shall not equally belong to all citizens.
Kansas
All political power is inherent in the people, and all free governments are founded on their authority, and are instituted for their equal protection and benefit. No special privileges or immunities shall ever be granted by the legislature, which may not be altered, revoked or repealed by the same body; and this power shall be exercised by no other tribunal or agency.
Kentucky
All men, when they form a social compact, are equal; and no grant of exclusive, separate public emoluments or privileges shall be made to any man or set of men, except in consideration of public services; but no property shall be exempt from taxation except as provided in this Constitution, and every grant of a franchise, privilege or exemption, shall remain subject to revocation, alteration or amendment.
Massachusetts
No man, nor corporation, or association of men, have any other title to obtain advantages, or particular and exclusive privileges, distinct from those of the community, than what arises from the consideration of services rendered to the public; and this title being in nature neither hereditary, nor transmissible to children, or descendants, or relations by blood, the idea of a man born a magistrate, lawgiver, or judge, is absurd and unnatural.
Minnesota
No member of this state shall be disfranchised or deprived of any of the rights or privileges secured to any citizen thereof, unless by the law of the land or the judgment of his peers. There shall be neither slavery nor involuntary servitude in the state otherwise than as punishment for a crime of which the party has been convicted.
Missouri
That no ex post facto law, nor law impairing the obligation of contracts, or retrospective in its operation, or making any irrevocable grant of special privileges or immunities, can be enacted.
Montana
No ex post facto law nor any law impairing the obligation of contracts, or making any irrevocable grant of special privileges, franchises, or immunities, shall be passed by the legislature.
North Carolina
No person shall be taken, imprisoned, or disseized of his freehold, liberties, or privileges, or outlawed, or exiled, or in any manner deprived of his life, liberty, or property, but by the law of the land. No person shall be denied the equal protection of the laws; nor shall any person be subjected to discrimination by the State because of race, color, religion, or national origin.
North Dakota
No special privileges or immunities shall ever be granted which may not be altered, revoked or repealed by the legislative assembly; nor shall any citizen or class of citizens be granted privileges or immunities which upon the same terms shall not be granted to all citizens.
New Mexico
The rights, privileges and immunities, civil, political and religious guaranteed to the people of New Mexico by the Treaty of Guadalupe Hidalgo shall be preserved inviolate.
New York
No member of this state shall be disfranchised, or deprived of any of the rights or privileges secured to any citizen thereof, unless by the law of the land, or the judgment of his or her peers, except that the legislature may provide that there shall be no primary election held to nominate candidates for public office or to elect persons to party positions for any political party or parties in any unit of representation of the state from which such candidates or persons are nominated or elected whenever there is no contest or contests for such nominations or election as may be prescribed by general law.
Nebraska
No bill of attainder, ex post facto law, or law impairing the obligation of contracts, or making any irrevocable grant of special privileges or immunities shall be passed.
Delaware
Florida
Louisiana
Maryland
Maine
Michigan
Mississippi
New Hampshire
New Jersey
Nevada
Rhode Island
Wisconsin
Ohio
All political power is inherent in the people. Government is instituted for their equal protection and benefit, and they have the right to alter, reform, or abolish the same, whenever they may deem it necessary; and no special privileges or immunities shall ever be granted, that may not be altered, revoked, or repealed by the general assembly.
Oklahoma
The Legislature shall pass no law granting to any association, corporation, or individual any exclusive rights, privileges, or immunities within this State.
Oregon
No law shall be passed granting to any citizen or class of citizens privileges, or immunities, which, upon the same terms, shall not equally belong to all citizens.
Pennsylvania
No ex post facto law, nor any law impairing the obligation of contracts, or making irrevocable any grant of special privileges or immunities, shall be passed.
South Carolina
The privileges and immunities of citizens of this State and of the United States under this Constitution shall not be abridged, nor shall any person be deprived of life, liberty, or property without due process of law, nor shall any person be denied the equal protection of the laws.
South Dakota
No ex post facto law, or law impairing the obligation of contracts or making any irrevocable grant of privilege, franchise or immunity, shall be passed.
Tennessee
That no hereditary emoluments, privileges, or honors, shall ever be granted or conferred in this state.
Texas
No citizen of this State shall be deprived of life, liberty, property, privileges or immunities, or in any manner disfranchised, except by the due course of the law of the land.
US
The Citizens of each State shall be entitled to all Privileges and Immunities of Citizens in the several States. A Person charged in any State with Treason, Felony, or other Crime, who shall flee from Justice, and be found in another State, shall on Demand of the executive Authority of the State from which he fled, be delivered up, to be removed to the State having Jurisdiction of the Crime. No Person held to Service or Labour in one State, under the Laws thereof, escaping into another, shall, in Consequence of any Law or Regulation therein, be discharged from such Service or Labour, but shall be delivered up on Claim of the Party to whom such Service or Labour may be due.
Utah
No law shall be passed granting irrevocably any franchise, privilege or immunity.
Virginia
That no man, or set of men, is entitled to exclusive or separate emoluments or privileges from the community, but in consideration of public services; which not being descendible, neither ought the offices of magistrate, legislator, or judge to be hereditary.
Vermont
Every person of good character, who comes to settle in this State, having first taken an oath or affirmation of allegiance to the same, may purchase, or by other just means acquire, hold and transfer land or other real estate; and after one year’s residence shall be deemed a free denizen thereof, and entitled to all rights of a natural born subject of this State, except those privileges, the right to which is herein elsewhere determined, and except also that such person shall not be capable of being elected Treasurer, or Representative in Assembly, until after two years’ residence, nor be eligible to the office of Governor or Lieutenant-Governor until the person shall have resided in this State as required by section 23 of this Constitution.
West Virginia
No hereditary emoluments, honors or privileges shall ever be granted or conferred in this state.
Washington
No law granting irrevocably any privilege, franchise or immunity, shall be passed by the legislature.
No law shall be passed granting to any citizen, class of citizens, or corporation other than municipal, privileges or immunities which upon the same terms shall not equally belong to all citizens, or corporations.
No hereditary emoluments, privileges, or powers, shall be granted or conferred in this state.
Wyoming
Since equality in the enjoyment of natural and civil rights is only made sure through political equality, the laws of this state affecting the political rights and privileges of its citizens shall be without distinction of race, color, sex, or any circumstance or condition whatsoever other than individual incompetency, or unworthiness duly ascertained by a court of competent jurisdiction.