(a) A controlling health plan must do all of the following:

1. (1) Obtain an HPID from the Enumeration System for itself.
2. (2) Disclose its HPID, when requested, to any entity that needs the HPID to identify the health plan in a standard transaction.
3. (3) Communicate to the Enumeration System any changes in its required data elements in the Enumeration System within 30 days of the change.

(b) A controlling health plan may do the following:

1. (1) Obtain an HPID from the Enumeration System for a subhealth plan of the controlling health plan.
2. (2) Direct a subhealth plan of the controlling health plan to obtain an HPID from the Enumeration System.