Please see that attached information on how to Enroll. The following instructions come from the APWU Health Plan.

You can fax the enrollment forms and the Postal Ease FEHB worksheet, to HR
Shared Services Center at (336) 662-4073 or send by USPS with tracking. The
mailing address is HRSSC, Compensation/Benefits, PO Box 970400, Greensboro,
NC, 27497-0400.  Tracking or a fax confirmation are recommended because
eligible employees must enroll within 60 days of reappointment. The tracking
will serve as your receipt. If enrollment is not submitted in the first 60
days of reappointment or a qualifying life event employees must wait until
Open Season to enroll.