what does advance directives mean

Insufficient information is included with which to answer. Directives from WHO, and/or in WHAT form?

what can the president do if a sate fails to comply with the directives of the central goverment

communicate, coordinate, and intergrate the controls who, what, when, where and how into directives and briefings
communicate, coordinate, and intergrate the controls who, what, when, where and how into directives and briefings.
Implementing controls the best ways to go is communicate, coordinate and integrate the controls. You have to find out when, where and how directives.

Do not resuscitate.