182544b3_licy__United_States_of_America__Documentation_Required
[State and Date Enacted] Washington – 3 Nov. 1998 Exemption from prosecution if patient qualifies, has no more marijuana than necessary for personal medical use and presents valid documentation to law enforcement; affirmative defence if in compliance with statute [Documentation Required] 
Signed physician statement or medical records that indicate that physician is of the opinion that the “potential benefits” of marijuana “would likely outweigh the health risks”
National Drug Policy: United States of America
Documentation Required