301.This section applies to adult residents of a residential unit in an occupied category 1 building or an occupied category 2 building, and owners of a residential unit in an occupied category 1 building or an occupied category 2 building (“occupied” and “owner” are defined in section 136).
302.Subsection (2) provides that adult residents and owners of residential units must not:
	in, on or in relation to, any of the common parts of the building, do any act that creates a significant risk of a structural safety risk materialising in relation to the building;
	in, or in relation to the residential unit, do any act that creates a significant risk of a structural safety risk materialising in relation to the building.
303.Subsection (3) provides that “common parts” in subsection (2)(a) has the meaning in section 54(3) i.e. includes balconies even if in the demise of a residential unit.
304.Subsection (4) requires those to whom this section applies to comply with certain requests for information i.e. where the information is necessary for the accountable person (or person who is treated as an accountable person because of section 36) to comply with certain duties (related to the assessment and management of structural safety risks).
305.Example: A resident undertakes renovation works to their flat and removes a load-bearing internal wall without complying with the Building Regulations 2010. This action could jeopardise the building's structural integrity. This would be a breach of section 55(2)(b) if it creates a significant risk of a structural safety risk materialising in relation to the building.
306.Example: A resident installs a hot tub on the balcony of their flat. The weight of the hot tub, when filled with water and occupied, exceeds the load-bearing capacity of the balcony. This would be a breach of section 55(2)(a) if it creates a significant risk of a structural safety risk materialising in relation to the building.
Commentary on Sections Part 1 - Safety of Buildings Containing Two Or More Residential Units Chapter 8 - Duties of Residents and Owners Etc. of Residential Units Section 55 - Category 1 and category 2 buildings: structural safety duties of residents etc.