although, I have been carrying a "locking blade" for over 10 years, and never have been pulled over (for it, or anything else) so really down to you to take a chance...(disclaimer, if you are pulled over, it wasn't me who said you are allowed to carry such a thing)
A locking blade falls into the same category as a fixed blade - can be carried with a legitimate reason or excuse. These can be occupational or recreational as long as it's lawful.
any blade that locks, is illegal. full stop!.
although, I have been carrying a "locking blade" for over 10 years, and never have been pulled over (for it, or anything else) so really down to you to take a chance...(disclaimer, if you are pulled over, it wasn't me who said you are allowed to carry such a thing)