The authority may contract to loan an amount not to exceed 50% of the cost of establishing a multiple-tenancy building project, subject to the following conditions:
(1) The authority shall determine the interest rate and repayment period of the loan.
(2) The loan must be evidenced by note of the borrower and secured by a first mortgage or participation in a first mortgage on the multiple-tenancy building project.
(3) The authority may contract to loan an amount not to exceed 50% of the cost of the project if the loan is secured by a first mortgage or participation in a first mortgage on the project. If the loan is not secured by a first mortgage or participation in a first mortgage on the project, the authority may contract to loan an amount not to exceed 40% of the cost of the project.
(4) If the loan is secured by a participation in a first mortgage on the project, the authority may permit a portion of its loan, not to exceed 10% of the cost of the project, to be secured by a second mortgage on the project which is second only to the participating first mortgage.