Here's a link to the actual amended law:

https://www.fema.gov/media-library-data/1582133514823-be4368438bd042e3b60f5cec6b377d17/Stafford_June_2019_508.pdf

Here's an interdasting provision: "Sec. 706. Firearms Policies (42 U.S.C. 5207)

(a) Prohibition on Confiscation of Firearms - No officer or employee of the United

States (including any member of the uniformed services), or person operating

pursuant to or under color of Federal law, or receiving Federal funds, or under control of

any Federal official, or providing services to such an officer, employee, or other person,

while acting in support of relief from a major disaster or emergency, may -

(1) temporarily or permanently seize, or authorize seizure of, any firearm the

possession of which is not prohibited under Federal, State, or local law, other

than for forfeiture in compliance with Federal law or as evidence in a criminal

investigation;

(2) require registration of any firearm for which registration is not required by

Federal, State, or local law;

(3) prohibit possession of any firearm, or promulgate any rule, regulation, or order

prohibiting possession of any firearm, in any place or by any person where such

possession is not otherwise prohibited by Federal, State, or local law; or

(4) prohibit the carrying of firearms by any person otherwise authorized to carry

firearms under Federal, State, or local law, solely because such person is operating

under the direction, control, or supervision of a Federal agency in support of relief

from the major disaster or emergency."

There may be other cool stuff. I have not checked beyond this dig.