(1)(a) A commercial real estate broker shall have a lien upon commercial real estate or any interest in that commercial real estate that is the subject of a purchase, lease, or other conveyance to a buyer or tenant of an interest in the commercial real estate in the amount of commissions that the commercial real estate broker is due.

(b) The lien shall be available only to the commercial real estate broker named in a commission agreement signed by an owner or buyer or their respective authorized agents as applicable and is not available to an employee, agent, subagent, or independent contractor of a commercial real estate broker.

(2) A lien under this section shall attach to commercial real estate or any interest in the commercial real estate when:

(a) The commercial real estate broker is entitled to a commission provided in a commission agreement signed by the owner, buyer, or their respective authorized agents, as applicable; and

(b) The commercial real estate broker records a notice of lien in the office of the register of deeds of the county in which the commercial real estate is located, prior to the actual conveyance or transfer of the commercial real estate against which the commercial real estate broker is claiming a lien, except as provided in this section. The lien shall attach as of the date of the recording of the notice of lien and shall not relate back to the date of the commission agreement.

(3) In the case of a lease, including a sublease or an assignment of a lease, the notice of lien shall be recorded not later than ninety days after the tenant takes possession of the leased premises. The lien shall attach as of the recording of the notice of lien and shall not relate back to the date of the commission agreement.

(4)(a) If a commercial real estate broker is due an additional commission as a result of future actions, including, but not limited to, the exercise of an option to expand the leased premises or to renew or extend a lease pursuant to a commission agreement signed by the then owner, the commercial real estate broker may record its notice of lien at any time after execution of the lease or other commission agreement which contains such option, but not later than ninety days after the event or occurrence on which the future commission is claimed occurs.

(b) In the event that the commercial real estate is sold or otherwise conveyed prior to the date on which a future commission is due, and if the commercial real estate broker has filed a valid notice of lien prior to the sale or other conveyance of the commercial real estate, then the purchaser or transferee shall be deemed to have notice of and shall take title to the commercial real estate subject to the notice of lien. If a commercial real estate broker claiming a future commission fails to record its notice of lien for future commission prior to the recording of a deed conveying legal title to the commercial real estate to the purchaser or transferee, then such commercial real estate broker shall not claim a lien on the commercial real estate. This subsection shall not limit or otherwise affect claims or defenses a commercial real estate broker or owner or any other party may have on any other basis, in law or in equity.

(5) If a commercial real estate broker has a commission agreement as described in subdivision (4)(a) of this section with a prospective buyer, then the lien shall attach upon the prospective buyer purchasing or otherwise accepting a conveyance or transfer of the commercial real estate and the recording of a notice of lien by the commercial real estate broker in the office of the register of deeds of the county in which the commercial real estate, or any interest in the commercial real estate, is located, within ninety days after the purchase or other conveyance or transfer to the buyer or tenant. The lien shall attach as of the date of the recording of the notice of lien and shall not relate back to the date of the commission agreement.