Registration of DEFENCE Builders & REGULATION 56AB Civil Engineering S.R.& O. 1941 No. 1038 * AS ANNOUNCED Contractors BY THE B.B.C. Under the above Regulation, all persons or firms carrying on business as Builders or Building Contractors or Building Sub- Contractors or Civil Engineering Contractors are required to be registered. This includes all undertakings engaged in the following and similar activities: general building demolition of buildings plumbing and glazing public works contracting painting, paperhanging and constructional engineering decorating installation of heating, joinery and carpentry ventilating and electrical plastering equipment in buildings slating and tiling etc.