Sections 3, 6 to 11 and 16 do not apply—
(a)to anything done for the purposes of the functions or under the authority of the procurator fiscal;
(b)in relation to the removal of any part of the body of a deceased person during a post-mortem examination of the body or the subsequent retention and use of the part or in relation to retention and use of a part of a body to which section 36 applies;
(c)in relation to retention and use of tissue sample to which section 38 or 47 applies or an organ to which section 40 or 48 applies;
(d)as respects the removal, retention or use of any part of a body of a deceased person if it is the body of a person who died before the day on which section 3 comes into force and at least 100 years have elapsed since the date of the person’s death.