§ 36-9-108 — "Amortization plan" defined

The amortization plan is hereby defined, when applied to state
land contracts or certificates, as being that plan under which
part of the principal is required to be paid each time interest
becomes due and payable, and under which this part payment on
the principal increases at each succeeding installment in the
same amount that the interest payment decreases, so that the
combined amount due on principal and interest on each due date
remains the same until the loan is paid in full.