--- You can refer to the following from murthy.com.....
Question : Hi, Sheela. I have 1 1/2 years left on H1B. Is it better to apply for labor through Maryland now or after PERM is introduced in October?
Answer : With a situation that is so close, it is not worth taking any risks and waiting, since PERM may not get passed, or even if it does, it may not help you in your particular case since there are many restrictions in how PERM was originally envisioned. Safest course is to start regular LC right away to ensure being able to file H1B extensions each year. Filing an LC can take 2 or 3 months even without running RIR advertisements, depending on various factors with your employer.