Are there any federal regulations about the need for hospital libraries?

I want to list all the well known authorities that support the need for
hospital libraries.

I know about the MLA Standards and JCAHO.  Can anyone think off other
relevant authorities?

TIA - Evelyn

Evelyn L. Walker
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St. Vincent Medical Center
Health Science Librarian
2131 West Third St.
Los Angeles, CA.  90057

(213) 484-5530 Voice
(213) 484-7092 FAX