介绍性文本1.引文，生效和解释2.对主要条例第3条的修订3.对主要条例第6条的修订4.对主要条例第7条的修订5.在主要条例中插入条例7A 6.对主要条例第20条的修订7.对主要规定签字解释性说明

Introductory Text1.Citation, commencement and interpretation2.Amendment of regulation 3 of the principal Regulations3.Amendment of regulation 6 of the principal Regulations4.Amendment of regulation 7 of the principal Regulations5.Insertion of regulation 7A into the principal Regulations6.Amendment of regulation 20 of the principal Regulations7.Amendment of Schedule 4 to the principal RegulationsSignatureExplanatory Note