### Building (Administration) Regulations 《建築物(管理)規例》

12. Plans, etc. to be signed by person who prepared them
(1) Subject to paragraphs (2) and (5), all plans, structural details and calculations submitted to the Building Authority for approval shall be prepared and signed by an authorized person, and his signature shall be deemed to be his assumption of all responsibility for the plan, structural details or calculations, as the case may be. (15 of 2004 s. 40)
(2) Subject to paragraph (3), all foundation plans, structural details and calculations required under regulations 8(1)(d) and (i) and 9(f) shall be prepared and signed by a registered structural engineer, and his signature shall be deemed to be his assumption of all responsibility for the plans, structural details or calculations, as the case may be.
(3) In the case of building works to which paragraph (4) applies, all foundation plans, structural details and calculations required under regulation 8(1)(d) and (i) may be prepared and signed by an authorized person, and his signature shall be deemed to be his assumption of all responsibility for the plans, structural details or calculations, as the case may be.
(4) Paragraph (3) applies to any building works where—
(a) the height of the construction does not exceed 10 m;
(b) the span of any structural element of the construction does not exceed 6 m;
(c) the structural elements are constructed of timber, masonry, steel, plain concrete or reinforced concrete;
(d) the foundations of the construction are of the spread footing type with a ground bearing pressure not exceeding 300 kPa and founded at not more than 2 m below existing ground level; and
(e) there is no structural alteration to any existing structural elements designed by a registered structural engineer.
(5) All geotechnical plans, geotechnical assessment, geotechnical details and calculations, geotechnical reports, site investigation reports or ground investigation reports required under or pursuant to regulation 8(1)(b)(iv), (ba), (bb), (bc), (d) and (l), (3) and (4)(c) shall be prepared and signed by a registered geotechnical engineer, and his signature shall be deemed to be his assumption of all responsibility for the geotechnical plans, geotechnical assessment, geotechnical details and calculations, geotechnical reports, site investigation reports or ground investigation reports, as the case may be. (15 of 2004 s. 40)
(L.N. 438 of 1990)

### Building (Administration) Regulations 《建築物(管理)規例》

13. Ratio of plans
(1) Plans and sections of building works shall be drawn to a ratio of not less than 1:100:

Provided that, in the case of very extensive building works, the Building Authority may accept plans drawn to a ratio of not less than 1:200.
(2) (a) Every key plan submitted in respect of street works shall be drawn to a ratio of not less than 1:2 500.
(b) Every layout plan so submitted shall be drawn to a ratio of not less than 1:200.
(c) Longitudinal sections so submitted shall—
(i) if horizontal, be drawn to a ratio of not less than 1:500; and
(ii) if vertical, be drawn to a ratio of not less than 1:200.
(d) Cross sections so submitted shall be drawn to a ratio of not less than 1:200.
(e) Typical road sections so submitted shall be drawn to a ratio of not less than 1:50.
(3) Every block plan shall be drawn to a ratio of not less than 1:500.
(L.N. 294 of 1976)

14. Plans must be clear and drawn or reproduced on suitable material
(L.N. 222 of 2021)(1) A plan submitted to the Building Authority for approval must be drawn or reproduced—
(a) in a clear and intelligible manner; and
(b) if submitted in hard copy form—on a suitable and durable material. (L.N. 222 of 2021)
(2) Engineering drawings shall not be reproduced, for submission to the Building Authority, on ferro-prussic prints.
(3) One copy of every plan shall be so coloured as to clearly differentiate existing work from new work and one part of any new work from the other parts thereof. (L.N. 241 of 1976)

15. Power of Building Authority to refuse to accept plans
The Building Authority may refuse to accept plans from 2 or more authorized persons, registered structural engineers or registered geotechnical engineers, in respect of works at the same premises.
(L.N. 188 of 1974; 15 of 2004 s. 41)

### Building (Administration) Regulations 《建築物(管理)規例》

18. Stability certificate
(1) Where any building works consist of repairs, alterations or additions to any building, the authorized person who has prepared the plans in respect of such building works shall, at the time such plans are submitted to the Building Authority for his approval, send to the Building Authority a certificate, in the specified form, that he has inspected such building and that it is, in his opinion, capable of bearing the loads and stresses which may be increased or altered in any way by reason of such repairs, alterations or additions. (L.N. 347 of 1993)
(2) Where such building has been constructed in such a manner as to require the services of a registered structural engineer such certificate shall be signed by the registered structural engineer and countersigned by the authorized person appointed in respect of the building works. 
(L.N. 188 of 1974)

18A. Certificate by authorized person, etc. to be submitted with plans
Where plans of any building works or street works are submitted to the Building Authority for his approval there shall be submitted, together with the plans, a certificate, which shall be in the specified form, by the authorized person, registered structural engineer or registered geotechnical engineer, as the case may be, who prepared the plans or under whose supervision the plans were prepared, that— (L.N. 347 of 1993; 15 of 2004 s. 42)
(a) the plans were prepared by him or under his supervision or direction; and
(b) to the best of his knowledge and belief the plans comply in all respects with the Ordinance and the regulations made thereunder.
(L.N. 10 of 1975; L.N. 241 of 1976; L.N. 438 of 1990)

19. Authorized person, registered structural engineer or registered geotechnical engineer who has prepared plans submitted to Building Authority to notify Building Authority if he ceases to be engaged
Where an authorized person, registered structural engineer or registered geotechnical engineer who has prepared any plans or other details of any building works or street works, which have been submitted to the Building Authority for his approval, ceases, for any reason, to act on behalf of the person for whom such building works or street works are to be carried out, he shall, in writing, within 7 days thereof, notify the Building Authority that he has so ceased to act.
(L.N. 188 of 1974; 15 of 2004 s. 43)