http://www.legislation.gov.uk/nisi/1979/1709/schedule/1/paragraph/11Building Regulations (Northern Ireland) Order 1979texttext/xmlenStatute Law Database2024-05-15Expert Participation2015-04-01SCHEDULESSCHEDULE 1MATTERS IN REGARD TO WHICH BUILDING REGULATIONS MAY BE MADE11Cesspools and other means for the reception, treatment or disposal of foul matter.