Some in fact do make up their rules as they go. Their authority is very widely written in most states.....very widely written. I don't believe there is a simply solution to this but surely there is a better way to deal with it.
CPAT is followed closely by most states because that piece of legislation hands them federal funding.

I did some research because of past posts regarding civil lawsuits filed against the CPS workers and/or law enforcement personnel and/or the state of Texas itself. As is the case in most instances where a CPS dept. removes children from a home, Texas CPS workers law enforcment etc. are immune from lawsuits providing they were "working in good faith".

ยง 261.106. IMMUNITIES. (a) A person acting in good
faith who reports or assists in the investigation of a report of
alleged child abuse or neglect or who testifies or otherwise
participates in a judicial proceeding arising from a report,
petition, or investigation of alleged child abuse or neglect is
immune from civil or criminal liability that might otherwise be
incurred or imposed.
(b) Immunity from civil and criminal liability extends to an
authorized volunteer of the department or a law enforcement officer
who participates at the request of the department in an
investigation of alleged or suspected abuse or neglect or in an
action arising from an investigation if the person was acting in
good faith and in the scope of the person's responsibilities.
(c) A person who reports the person's own abuse or neglect
of a child or who acts in bad faith or with malicious purpose in
reporting alleged child abuse or neglect is not immune from civil or
criminal liability.
http://tlo2.tlc.state.tx.us/statutes/docs/FA/content/htm/fa.005.00.000261.00.htm

The only person, or so it seems from what I've read, that could be held liable for any civil suits is the caller. (Btw, this is pretty much SOP in most states these days.) They don't want their CPS workers or law enforcement personnel getting sued every time they turn around because they're investigating an anonymous charge of child abuse and/or neglect.

There is plenty more at that site which I didn't read. However my purpose was to find out if CPS workers/investigators could be sued by this cult for removing their children in the first place and it appears that Texas legislation protects CPS workers, law enforcement personnel etc. from such suits if same were "working in good faith".