Fannie Mae and Freddie Mac have to make the adjustments individually for every county throughout the United States. Many of the counties fall into the "general" regulations. However, King and Snohomish are not on the "general" guidelines. Once they have finalized our counties, then all the lenders have to find the investors that will buy the loans. These changes take time. Despite what the common thought is unfortunately there is NO specific date out there just yet.
Simply put they have changed the HUD guidelines. Because King and Snohomish county are not the "standard", then the wait will take a little time. Again at this date, there is no specific date for our counties. It is estimated sometime in April however it could be May or June before they are truly in effect.
I know this makes it as clear as mud but hopefully it explains the process enough to give a little more understanding to the process. Take comfort in knowing they will take effect soon.