the person who controls a cesspool serving only one or more private dwellings in its area to empty the cesspool, to remove such of the contents of the cesspool as the authority considers appropriate on payment if the authority so requires of a reasonable charge; and a collection authority may, if requested by the person who controls any other privy or cesspool in its area to empty the privy or cesspool, remove matter from it on payment as aforesaid. In this subsection " privy " means a latrine which has a moveable receptacle for faecal matter and " cesspool " includes a settlement tank or other tank for the reception or disposal of foul matter from buildings. (a) construct, lay and maintain, within or outside its area, pipes and associated works for the purpose of collecting waste in pursuance of this section; (b) contribute towards the cost incurred by another person in providing or maintaining pipes or associated works connecting with pipes provided by the authority in pursuance of the preceding paragraph. (7) Parts V and VI of Schedule 3 to the M1 Water Act 1945 (which relate to the laying of mains and the breaking up of streets) shall apply in relation to pipes and associated works provided or to be provided in pursuance of paragraph (a) of the preceding subsection as those Parts apply in relation to water mains and pipes but as if --  (a) sections 19(4) and 21 of that Schedule (which relate to the erection