SI 2023/362. The Building Safety Act 2022 (Commencement No. 4 and Transitional Provisions) Regulations 2023. Comes into force on 1st April; sections 5, 6, 8, 9(3), 47, 55, 133 and parts of Schedule 5. Comes into force 6th April; sections 12 to 16, 20, 22 to 25, 27, 29, 32 to 39, 42, 44, 46, 49 to 53, 71 to 78, 107 to 110, 112, 114, 142 and 145. 1st October section 156.