1. A savings bank may not invest more than forty percent of its total assets in commercial loans. A commercial loan is a loan for business, commercial, corporate or agricultural purposes.
2. A savings bank shall maintain at least fifteen percent of its assets in assets and investments taken from the following categories:
(1) First and second lien residential mortgage loans or foreclosed residential mortgage loans;
(2) Home improvement loans;
(3) Interim residential construction loans; and
(4) Mortgage-backed securities.