Either a local company employs you, to do a task they want.. Or you must open your own company, with all that means (offices, staff, corp tax, sales tax, etc) and employ yourself.
Or you can look at umbrella payrolls like sponsoredworkpermit.com or talk to lawyers who often can matchmake between a Thai corp that has the ability to put you on the payroll and a farang who wants a work permit but this is getting into the shady side.
yeah I am not 100% but I believe my brother doesnt have it, and hes 5 years younger than me.. So somewhere in that range 89 - 94 ish maybe is a range I think it changed. Thats a lot of guesswork though.