介绍性文本1.引证、生效和解释2.在某些情况下，根据1977年《命令》第31条规定提高费率降低3.在第（1）（b）（i）款和许可证中使用的用语（北方签字解释性说明

Introductory Text1.Citation, commencement and interpretation2.Increased rates reduction provided under Article 31 of the 1977 Order in certain cases3.Expressions used in paragraph (1)(b)(i) and in the Licensing (Northern.SignatureExplanatory Note