(1) Any interest in real property capable of being transferred may be mortgaged to secure (a) existing debts or obligations, (b) debts or obligations created simultaneously with the execution of the mortgage, (c) future advances necessary to protect the security, even though such future advances cause the total indebtedness to exceed the maximum amount stated in the mortgage, or (d) any future advances to be made at the option of the parties in any amount unless, except as otherwise provided under subsection (2) or (3) of this section, a maximum amount of total indebtedness to be secured is stated in the mortgage.

(2) Future advances necessary to protect the security shall include, but not be limited to, advances for payment of real property taxes, special assessments, prior liens, hazard insurance premiums, maintenance charges imposed under a condominium declaration or other covenant, and costs of repair, maintenance, or improvements. Future advances necessary to protect the security are secured by the mortgage and have the priority specified in subsection (3) of this section.

(3)(a) Except as provided in subdivision (b) of this subsection, all items identified in subsection (1) of this section are equally secured by the mortgage from the time of filing the mortgage as provided by law and have the same priority as the mortgage over the rights of all other persons who acquire any rights in or liens upon the mortgaged real property subsequent to the time the mortgage was filed.

(b)(i) The mortgagor or his or her successor in title may limit the amount of optional future advances secured by the mortgage under subdivision (1)(d) of this section by filing a notice for record in the office of the register of deeds of each county in which the mortgaged real property or some part thereof is situated. A copy of such notice shall be sent by certified mail to the mortgagee at the address of the mortgagee set forth in the mortgage or, if the mortgage has been assigned, to the address of the most recent assignee reflected in a recorded assignment of the mortgage. The amount of such secured optional future advances shall be limited to not less than the amount actually advanced at the time of receipt of such notice by the mortgagee.

(ii) If any optional future advance is made by the mortgagee to the mortgagor or his or her successor in title after receiving written notice of the filing for record of any trust deed, mortgage, lien, or claim against such mortgaged real property, then the amount of such optional future advance shall be junior to such trust deed, mortgage, lien, or claim. The notice under this subdivision shall be sent by certified mail to the mortgagee at the address of the mortgagee set forth in the mortgage or, if the mortgage has been assigned, to the address of the most recent assignee reflected in a recorded assignment of the mortgage.

(iii) Subdivisions (b)(i) and (ii) of this subsection shall not limit or determine the priority of optional future advances as against construction liens governed by section 52-139.

(4) The reduction to zero or elimination of the debt evidenced by the instruments authorized in this section shall not invalidate the operation of this section as to any future advances unless a notice or release to the contrary is filed for record as provided by law.