First, section 10(1)(a) allows the definition to be amended to include other premises which may in future provide abortion services where those are a class of place mentioned in section 1(3A) of the 1967 Act that is approved under section 1(3) of that Act for the purposes of that section (section 1(3A) allows a class of place to be approved where the treatment consists primarily in the use of medicines specified in the approval and carried out in such manner as may be specified).