http://webserver1.lsb.state.ok.us/cf_pdf/2013-14 ENGR/hB/HB2874 ENGR.PDF That's the text of the bill, adding a new paragraph G, containing the new records disposition and expiration date. No expiration date is in the current text of 1290.14.
http://www.ok.gov/osbi/documents/SDA_Lawbook_NOV_2013.pdf
So then it is not extending the expiration date...it is establishing one.
Sounds like a successful lobby by the SDA instructors...LOL.
Currently there is no sunset or expiration if you will of SDA class certificates. From a practical knowledge standpoint, I do encourage those with older class certificates to consider retaking the class if its obvious that they have lost much of the information that they once had shortly after taking that class back in the dim environs on time. There is too much at risk for them to be short on current knowledge and handgun manipulating skills.
The same could be said for permit holders no? Just having a permit doesn't mean you've kept up with the law/training. It makes no sense to make non-permit holders training certs expire while current permit holders don't face the same mandate.
I personally see no need for mandatory recurring training or expiration of certificates.