No, the 18-month period in which credit is valid for will not be changing. The only information I can find regarding changes similar to this is the possibility for continuous testing the middle of next year… https://nasba.org/blog/2019/05/17/continuous-testing-rule-adopted/ but this doesn't guarantee that it will be effective then.
I've heard that they are extending from 18 to 24 months but wouldn't count on anything until NASBA publishes it themselves! And yes, continuous testing is passed and to be implemented by June/July 2020! Thank God!