HIPAA Special Enrollment and Section 125 Safe Harbor

Hello -

Seeking compliance clarification on a few items.

1. HIPAA Special Enrollment Rights - Do I understand correctly that when an employee experiences of these events, in addition to adding a spouse or child to coverage, they must be allowed to add other dependents and change health, dental, vision plan elections? 

2. Section 125 Plan Safe Harbor requiring reinstatement of same coverage within 30 days of loss of coverage due to rehire, expiration of benefit eligible FMLA or non-FMLA leave. Can an employer require/allow employee to make new elections if they want to? If so, should this be specified in the Plan Document and SPD?