Leviticus 20

Leviticus 20:18

"And whatever man shall lie with a woman that is set apart [for a flux], and shall uncover her nakedness, he has uncovered her fountain, and she has uncovered the flux of her blood: they shall both be destroyed from among their generation."
What is the penalty for sexual relations during menstruation?
Contrasting Link: Leviticus 15:24

The context for Leviticus 15:24 is set by 15:19: 'And if a woman have an issue...' The matter is conditional, whereas in 20:18 it is in the context of intentional relations. 15:24 refers to an incident that happens when menstruation is unexpected, whereas 20:18 refers to sexual relations at a time when it is known to be happening.