(1) Subject to subsection (3) and sections 101 to 107, a mortgagee or any other person for the time being entitled to receive, and give a discharge for, the mortgage debt may sell or concur with any other person in selling the mortgaged property provided -
(a) following service of notice on the mortgagor requiring payment of the mortgage debt, default has been made in payment of that debt, or part of it, for 3 months after such service, or
(b) some interest under the mortgage or, in the case of a mortgage debt payable by instalments, some instalment representing interest or part interest and part capital is in arrears and unpaid for 2 months after becoming due, or
(c) there has been a breach by the mortgagor, or some person concurring in the mortgage, of some other provision contained in the mortgage or any statutory provision, including this Act, other than a covenant for payment of the mortgage debt or interest,
and provided in each such case 28 days' notice in the prescribed form ha
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