(1) A registered undertaking, other than a restricted membership undertaking, shall not refuse to effect a health insurance contract with or for a person of whatever age or such a person and his or her dependants except in such cases (if any) or in such circumstances (if any) as may be prescribed.

(2) A restricted membership undertaking shall not -

(a) impose as a condition of qualification for membership of the undertaking a requirement as to age,

(b) refuse to admit to membership of the undertaking a person who is qualified for such membership and requests to be so admitted, or

(c) refuse to effect a health insurance contract with or for such a person as aforesaid or with or for such a person and his or her dependants,

except in such cases (if any) or in such circumstances (if any) as may be prescribed.