§ 163-a. Supplementary plan. 1. For the purposes of this section, the
term "supplementary plan" shall mean a health benefit plan which
provides an adjustment to the deductible or co-insurance liability or to
the benefits provided by the statewide health benefit plan purchased
pursuant to section one hundred sixty-two of this article.

2. The president may require the insurer of a supplementary plan to
the statewide health benefit plan, provided as a result of a
collectively negotiated agreement pursuant to article fourteen of this
chapter, to make a comparable supplementary plan available to
participating employers as of the implementation date of the state
employees' supplementary plan. The comparable supplementary plan shall
be experience rated as to those participating employers electing it,
with the costs thereof allocated equitably among them.

3. Every participating employer which, on or before July first,
nineteen hundred eighty-five, entered into a collectively negotiated
agreement pursuant to article fourteen of this chapter with employee
organizations representing its employees to provide the statewide health
benefit plan shall provide such comparable supplementary plan on the
date established by the president until the expiration of such
negotiated agreement.