A county council in England, a local authority in England or a parish ... council may, subject to subsection (2) of this section, provide sanitary conveniences in proper and convenient situations.
Any such council or authority shall not provide any such convenience in or under a highway or proposed highway for which they are not the highway authority without the consent of the highway authority.
Any such council or authority who provide any public sanitary conveniences, may—
In this section the expression “sanitary conveniences” includes lavatories.