Regulations may provide for any functions which are exercisable by a Special Health Authority under section 7 to be exercised—
by another Special Health Authority, or
jointly with one or more other Special Health Authorities.
Regulations may provide—
for any functions which are exercisable by a Special Health Authority under section 7 ... ... or this section to be exercised on behalf of that Special Health Authority by a committee, sub-committee or officer of the Special Health Authority,
for any functions exercisable jointly under subsection (1)(b) to be exercised, on behalf of the Special Health Authorities in question, by a joint committee or joint sub-committee.