The context of these two verses considers the position of a priest’s daughter. As long as she is under the headship of her father, she experiences the privileges of being a part of the family. As such, she may eat of the holy food. If, however, she marries someone outside of the priesthood, she may not eat of the contribution.
12 If a priest’s daughter marries a layman, she shall not eat of the contribution of the holy things.