"Sex" means the biological state of being female or male, based on an individual's nonambiguous sex organs, chromosomes, and endogenous hormone profile at birth. [...] An interscholastic or intramural athletic team or sport sponsored by a school must be expressly designated as one of the following based on the sex of the intended participants: (a) "Males", "men", or "boys"; (b) "Females", "women", or "girls"; or (c) "Coed" or "mixed". III. An athletic team or sport designated for "females", "women", or "girls" may not be open to students of the male sex. IV. A locker room or restroom that is designated for "females", "women", or "girls" may not be open to students of the male sex.