S pass application

Dear All,
My s pass application was submitted April 17 and I saw it online in pending date April 19. After that May 02 I saw my status like that...
We need to input some other agencies to process this application, out come result will be within 4 weeks or some cases longer.
My question is within 4 weeks from which date?. From April 17?.
And what is the meaning for this kind of status?. Please suggest.
Thanks.

Please read existing discussions before you post a question - the answers are already there!
Regarding the "4 weeks from which date": Of course from the date it was posted!