Section 1 of the M1Petroleum Royalties (Relief) Act 1983 (royalty exemption for petroleum from certain new offshore fields) shall apply to any licence granted under section 2 of the M2Petroleum (Production) Act 1934 which incorporates all or any of the model clauses set out in Schedule 4 to the M3Petroleum (Production) (Seaward Areas) Regulations 1988 (production licences for seaward areas) as it applies to licences so granted which incorporate all or any of the model clauses specified in subsection (2) of that section, including any licence granted after the passing of this Act.