Yes — the collaborative agreement is a formality and does not affect day-to-day practice.

In a reduced practice authority state, the collaborative agreement is a legal requirement. Without a valid agreement, the PMHNP may not have legal authority to prescribe or practice. The PMHNP should establish a new collaborative agreement immediately and consult the state board of nursing regarding any grace period.

Yes — once established, a collaborative agreement remains valid indefinitely.

The PMHNP can continue prescribing non-controlled substances but must stop prescribing controlled substances.