The documents -- which became effective today -- clearly state that Wayne "may not consume or drink any substance containing alcohol" as long as he's on probation ... for the next 36 months.

Wayne is also prohibited from knowingly associating with any person engaged in criminal activity or any person with a criminal record without prior written approval from the probation department.

And Wayne cannot possess illegal drugs, toxic vapors or controlled substances.

He's also required to submit to drug and alcohol testing, per the probation dept.

If Wayne violates any of the terms of his probation -- he could be sent to prison to serve out the remainder of his term.

The source is TMZ so you never know. If it is true thats crazy because Weezy hasn't been sober in forever. All those verses we love and recite came from an intoxicated Lil Wayne. Let's see how this plays out.