Can you drug test 1099 independent contractors without just cause?
If you are an independent contractor, then the relationship between you and the company or person hiring you is governed by contract: if the contract or service agreement, etc. you agreed to allows for a drug test without cause, they can do this; if it does not, then they can't. (Note: contracts can be oral or verbal, or can be found from emails and correspondence describing the working relationship; it does not have to be a single "obvious" contract.) Of course, when a given project or working assignment, etc. is up, the client hiring you is free to make it a term of any new contract that you submit to drug tests; and if you do not want to, your recourse (assuming you can't get them to reconsider) is to not take the contract.