Site: nolo.com
... A legal standard used to determine whether a statute, rule, or policy ("law") is constitutional when ... the law:
substantially impairs the exercise of a fundamental right, or
involves a suspect classification ... —any classification based on race or national origin, or a state law classification based on citizenship ... To meet this standard, the government must prove that the law is:
motivated by a compelling government ... interest, such as the protection of human life or safety, and
narrowly tailored, meaning that the law ...