Revised 4/1/16: Governor Inslee signed SB6165 into law! It goes into effect in 90 days after the session that it was passed. Since this was passed as part of the regular session I believe that will be June 9.  
This gives folks who want to do a Form 1 prior to the ATFE 41F changes a window that they can file (have to submit prior to July 14th) .

SOURCE: http://app.leg.wa.gov/billinfo/summary.aspx?bill=6165&year=2015#history

There was a glitch in the Legislature's fix for allowing SBRs. Unfortunately, the ATF interpreted it to disallow Form 1's from non-licensed individuals. 

The wording has been fixed and awaits Governor Inslee's signature.

CORRECTION: Speaker signed the bill 3/9/16 and has been delivered to the Governor.

 UPDATE 3/10: Governor has signed 10 bills and vetoed 27 as a result of a budget debate with the State Legislature. This bill does not appear on the signature or vetoed list (http://www.governor.wa.gov/office-governor/official-actions/bill-action).  If not vetoed or signed it becomes laws in 20 days (not counting Sundays).