Is for Israel to uphold the treaty fully...as in Palestinian Self Rule. If Israel wants to hold Egypt resposnible for maintaining peace in the Sinai then currently troop limits will need to be raised and given it is Egypt sovereign territory Israel really cannot determine what is or isn't. Things have changed since 1979 and Israel has never fully honoured the treaty.
Seven Libyan soldiers killed in clashes with ISIS (Reuters)
from the article: Lieberman: Israel won't accept alterations to peace treaty with Egypt