Repayment of all or part of the principal, which is the loan plus the administrative fee, may be deferred during a development period not exceeding 10 years within the maximum 50-year repayment period, when in the department`s judgment such development period is justified under the circumstances. Interest on the principal shall not be deferred. Repayment of principal which is deferred during a development period may, at the option of the supplier, be paid in annual installments during the remainder of the loan repayment period.
