Multi-ER health plan

[lexi]

Following up on a thread posted below re ER-specific data from a multiemployer plan, we had a multi-ER group health care plan that was informed that premiums were to be increased by over 10%. when asked about the basis for the increase, the fund administrator refused to release that information (claiming there was a confidentiality agrmn't in place between the fund and the health care insurer).

Is there any provision in ERISA or the DOL regs that would require the fund administrator and/or insurer to release basis for the 10%+ premium increase?