None of the knives will really be for self defense. If things get that bad, I lost already.
I just want a pocket knife for edc, and something in my bag for the unexpected at work.
Since I am in telecom, (even as a project manager) everyone has the ubiquitous Klein Splicer Kit.
http://www.kleintools.com/catalog/cable-splicers-knives/cable-splicers-kit-free-fall-snipSo this and a SAK farmer may have to be it. I am glad I asked. I assumed everyone was allowed a lock blade as they are safer than non-locking.
Thanks for the responses so far.
Oh, and No Mexico at all.
IMHo you would do well to check the current legislation whenever you go to a different country. There is a fair bit of info available online, you can already find some useful stuff here to get you started:
https://en.wikipedia.org/wiki/Knife_legislationRemember though that laws do change, and what may or may not be acceptable to carry is very often left to the interpretation of law enforcement and judges.
In my experience, a regular non-locking SAK or multitool is generally considered OK in most places, particularly if carried in a purse or backpack. Whenever in doubt, avoid any sort of one-hand opening tactical folders and do not wear a folder clipped to your pocket or anywhere else where it's easily visible.
As a tourist or foreign visitor you may expect the local authorities to give you the benefit of doubt most of the time. Being a foreigner on the road does give you a pretty good excuse for carrying a small utility knife, more so because of your line of work. Just don't display a knife in public or carry it to any public events where rowdy behavior might be reasonably expected (partying, football matches etc.).