10. In any proceedings in respect of an act done before 1st March 1995 which is alleged to constitute a contravention of regulation 36 of the principal Regulations as read with regulation 37 of, and Schedule 6 to, those Regulations, as the said regulation 37 and Schedule 6 are amended by regulations 4, 5 and 7 of these Regulations, the defendant shall not be convicted of an offence under the principal Regulations if that act was in accordance with regulations 36 and 37 of, and Schedule 6 to, the principal Regulations before amendment by regulations 4, 5 and 7 of these Regulations.