Montana HB471

A school may not allow a child to attend identity instruction unless the child's parent or guardian agrees in writing to allow the child to attend. [...] A child is excused from participating in identity instruction unless the child fails to attend after the parent or guardian has agreed in writing to allow the child's attendance.

"Human sexuality instruction" means teaching or otherwise providing information about human sexuality, including intimate relationships, human instruction that has the goal or purpose of studying, exploring, or informing students about any of the following human sexuality topics: intimate relationships, sexual anatomy, sexual reproduction, sexually transmitted infections, sexual acts, sexual orientation, gender identity, abstinence, contraception, or reproductive rights and responsibilities.

"Identity instruction" means instruction that has the goal or purpose of studying, exploring, or informing students about gender identity, gender expression, or sexual orientation.