The Colorado State Board of Health approved a program through which poor medical marijuana patients can apply to the state registry for free and not have to pay sales tax on their cannabis purchases. But the standard the board approved for determining who is poor enough to qualify for the program upset medical marijuana advocates, who said some indigent patients will still be stuck with a bill. And even some board members expressed frustration that the health department — which has received millions of dollars in application fees since the medical marijuana program began — couldn't put together a program that includes more patients.