154.Section 99 makes explicit provision for relevant authorities (either individually or acting together with another authority or authorities) to establish one or more management schemes for Nature Conservation and Demonstration and Research MPAs and any European marine site situated in the Scottish marine area which is included in whole or in part in, or includes in whole or in part, or adjoins, a Nature Conservation or Demonstration and Research MPA. The purpose of management schemes is to further the conservation objectives or stated purpose of an MPA or the protection of a European marine site to which a management scheme applies. Under the scheme, the relevant authority’s functions are exercised to that effect. Management schemes may be time limited and amended from time to time. “Relevant authority” here means any public body exercising functions in the Scottish marine protection area or the Scottish Ministers.