PART I INTRODUCTION

3 Application and duties
1 These Regulations shall apply within the territorial sea only to and in relation to the premises and activities to which any of paragraphs 2 to 6 of Schedule 4 applies.
2 Subject to Schedule 1 (which sets out exceptions to the Regulations), these Regulations shall apply to or in relation to pressure systems which are used or intended to be used at work.
3 Any requirement or prohibition imposed by these Regulations on an employer in respect of the activities of his employees shall also extend to a self-employed person in respect of his own activities at work.
4 Any requirement or prohibition imposed by these Regulations on a person –
(a) who designs, manufactures, imports or supplies any pressure system, or any article which is intended to be a component part of any pressure system, shall extend only to such a system or article designed, manufactured, imported or supplied in the course of a trade, business or other undertaking carried on by him (whether for profit or not);
(b) who designs or manufactures such a system or article shall extend only to matters within his control.
5 The provisions of Schedule 2 (which relate to the modification of duties in cases where pressure systems are supplied by way of lease, hire or other arrangements) shall have effect.