Regulations 6(2), 6(3)(a) and 8(2)
1. A guard-rail, toe-board, barrier or other similar means of protection shall—
(a)be suitable and of sufficient strength and rigidity for the purpose or purposes for which it is being used; and
(b)be so placed, secured and used as to ensure, so far as is reasonably practicable, that it does not become accidentally displaced.
2. Any structure or any part of a structure which supports a guard-rail, toe-board, barrier or other similar means of protection or to which a guard-rail, toe-board, barrier or other similar means of protection is attached shall be of sufficient strength and suitable for the purpose of such support or attachment.
3. The main guard-rail or other similar means of protection shall be at least 910 millimetres above the edge from which any person is liable to fall.
4. There shall not be an unprotected gap exceeding 470 millimetres between any guard-rail, toe-board, barrier or other similar means of protection.
5. Toe-boards or other similar means of protection shall not be less than 150 millimetres high.
6. Guard-rails, toe-boards, barriers and other similar means of protection shall be so placed as to prevent, so far as is practicable, the fall of any person, or any material or object, from any place of work.