Optional administrative period.
(vi) Optional administrative period. An applicable large employer member may provide for an administrative period that begins immediately after the end of a standard measurement period and that ends immediately before the associated stability period; however, any administrative period between the standard measurement period and the stability period for ongoing employees may neither reduce nor lengthen the measurement period or the stability period. The administrative period following the standard measurement period may last up to 90 days. To prevent this administrative period from creating a period during which coverage is not available, the administrative period must overlap with the prior stability period, so that, during any such administrative period applicable to ongoing employees following a standard measurement period, ongoing employees who are enrolled in coverage because of their status as full-time employees based on a prior measurement period must continue to be covered through the administrative period. Applicable large employer members may use administrative periods that differ in length for the categories of employees identified in paragraph (d)(1)(v) of this section.