I don't want you to think I am arguing, but I think you may benefit from a different perspective. You are concentrating too much on semantics that only matter on pot forums, not in a courtroom.
Knowing what we know about the legislation, but not knowing how LEO will interpret the legislation in each and every jurisdiction where this could happen, is important to consider.
This came up recently in Douglas County when they were deciding to limit outdoor and/or indoor grows to 12 plants. The property is in unincorporated Douglas County, Littleton address, local HOA.
What, precisely, is your interpretation of the 'locked' rule that you reference? Locked how? Which county sheriff did you ask and did you record the conversation or get an email quote that can be attributed? I believe the answer to the question depends on the audience. Shouldn't this question be answered by the enforcement person knocking on your door? If you are looking for how local police departments are implementing this policy, that's another question. I just don't think it's useful for you and I to discuss what exactly a locked greenhouse is, because that definition is not ours to make, in this situation.
I remember a doctor telling me that I could grow as many plants as I wanted as long as it was in six pots or plots. He said that they don't count stems, just pots. I also remember thinking that it was an urban legend that cops weighed the entire root ball when people got busted but then the south metro drug task force confirmed that their SOP was to weigh the ball.
I guess I'm saying that this isn't our interpretation to make, the decision belongs to someone else, probably with a badge. Our efforts to get clarity on the issue will likely be in vain, because clarity is not what LEO is looking for. They want stats. Another issue that came up with the douglas county issue was enforcement. A house being used to grow marijuana was asked to downsize their grow from 150-200 plants to 48, but they went all the way down to 12. The nextdoor neighbors, the HOA, the people who filed the complaints, the mmed, they all wanted to know that the 'problem' had been resolved, they wanted to verify via inspection. The thing is, the only thing that could happen is a knock and talk, which was done three times, and all were voluntary. The residents could have easily refused, and the HOA had no recourse, and neither did the county. If a resident refuses a knock and talk, the next step is an application for a search warrant. If I am mistaken I will happily eat my words, but I think that the issue here is simply semantics, and it comes at our expense.