This will be another in a long list of laws passed to say we did something to keep us safe from _______ in response to an event way into the tail of propablilities. How exactly can the use of trigger locks be inspected/enforced? If I duct tape it to the gun, then does that count as being on? What exactly constitutes a trigger lock? Are there certified manufacturers, licensed distributors? Is there a QA program for the metal used in the trigger lock? Does an independent agency routinely inspect the manufacturers to assure that the locks produced do what is intended?
I think general enforcement is problematic ... but criminal charges in connection with another incident would not be unheard of. For instance, if somebody accidentally gets shot, they’ll ring you up on criminal negligence for failure to secure the weapon according to the law.