Yesterday, an attorney representing Nick Diaz formally challenged Nick's marijuana metabolites suspension by submitting a response to the Nevada State Athletic Commission. But it appears that the NSAC has already rebuked the defense by claiming Diaz lied on his pre-fight questionnaire (via Yahoo Sports):

Christopher Eccles, a Nevada deputy attorney general who represents the state athletic commission, referred telephone calls and email messages to public information officer Jennifer M. Lopez.

In a written statement, Lopez said, "Not only did Nick Diaz violate the law by testing positive for marijuana metabolites, but he also lied to the Commission on his Pre-Fight Questionnaire when he swore that he had not used any prescribed medications in two weeks before the fight."

Along with the article is an unverified document claiming to be a copy of Diaz's pre-fight questionnaire where he checked "no" to "have you taken/received any prescribed medications in the past two weeks". Here is a link to that document. Nick's attorney, Ross Goodman, stated in his report that Diaz stopped using marijuana (which is prescribed to him by a California physician for his ADHD) eight days before his UFC 143 bout with Carlos Condit.

Will this change anything in regards to how the situation is handled? We'll have to wait and see.