Canon 3
If a cleric, being of an equal or higher grade than that of a deacon, would dare to have by him a woman as a help, if it is not his grandmother, mother, sister, daughter, granddaughter, or his wife which took the vow of chastity, he should be barred from communion. An equal punishment should be imposed on a woman, if she would be unwilling to separate.
(trans. J. Szafranowski)