(1)Where a secure tenant has claimed to exercise the right to buy and—
(a)his right has been established and his notice claiming to exercise it remains in force,
(b)he has claimed the right to a mortgage but is not entitled, or treated as entitled, to a full mortgage, and
(c)he is entitled to defer completion,
he also has the right to be granted a shared ownership lease of the dwelling-house in accordance with the following provisions of this Part.
(2)Where the right to buy belongs to two or more persons jointly, the right to be granted a shared ownership lease also belongs to them jointly.