N.Y. Comp. Codes R. & Regs. tit. 11, § 360.9
(c) Notwithstanding subdivision (a) or (b) of this section, certain administrative service arrangements and stop-loss, catastrophic or reinsurance coverages insuring a plan which were in effect on or before December 31, 1991 may temporarily continue beyond April 1, 1993 but only if all of the following conditions are met:
(3) The acceptance of additional employers or other member groups comprised of 50 or fewer employees or members (exclusive of spouses and dependents) into the association group between June 1, 1992 and April 1, 1994 must be limited to 10 percent per year as compared to the total number of persons covered under the association group as of June 1, 1992. This limitation shall not apply in the event that an association group is in compliance with paragraphs (4), (5) and (6) of this subdivision, and so notifies the superintendent.
If these growth limitations are exceeded, an insurer may no longer continue to provide administrative services or stop-loss, catastrophic or reinsurance coverage to that association group. Nothing herein shall be deemed to limit the addition of employer groups or other member groups with more than 50 employees or members (exclusive of spouses and dependents).
(9) To register with the superintendent the names of association groups pursuant to paragraph (8) of this subdivision, a letter must be sent to the Health Bureau of the Department of Financial Services on or before April 1, 1993. For each association group to be registered the letter shall list:
(vi) the effective date of the health benefits coverage for covered employees offered by the group pursuant to the administrative services only and/or stop-loss, catastrophic or reinsurance arrangement with the insurer.
An insurer may not provide or continue to provide administrative services or stop-loss catastrophic or reinsurance coverage unless all of these conditions are met and continue to be met.