Musar על יבמות 149:19

Commandment 168 forbids a ritually unclean person to eat any part of the sacrifices or other hallowed matter that may otherwise be eaten by someone who is ritually clean. The operative verse is "she must not touch anything that is holy" (12,4). Our sages in Makkot 14 view this as a prohibition directed at the person eating such "holy" things.