don't forget this will not be do only document you need. I presume you will need labo or other test showing you covid 19 free. And again I presume you will need insurance covering you for 100.000 $ & covid 19 stating in your policy or separate letter.
All these things will be updated soon. Keep an eye on C.A.A.T , T.A.T and P.R government website. Good luck and stay safe.