My MIL has a revocable trust and will made up after her diagnosis with ALZ three years ago. In it states that as her POA's we have the right to make the decisions for her in all matters health, financial etc. So, would we still need to get a gaurdianship in order to place her in ASL? We had this all done by a Elder law attorney.
Only the Trustee can manage the Trust. If you are successor Trustee and the Trustor/Trustee who created the Trust is incompetent then you are the Trustee but will require an attorney. A GOOD POA written by an ATTORNEY will serve as your ability to do all other things for things not held in the trust, accounts and etc. But many banks don't accept online POAs witnessed only by a Notary.
You currently need a Trust and Estate Attorney to answer your questions about what you can and can't do as regards the Trust. This person can answer questions about your POA as well.
I am assuming that MIL is now judged incompetent under the law?
You do not need guardianship to place her. You can do that with a POA if she's declared incapacitated and unable to make decisions for herself.
Is it a durable POA, that took effect immediately? Or does it state she needs to be declared incompetent?