This is wrong. Every petition must be "approvable when filed", so if a visa number is not available then the I-485 cannot be submitted.
It seems you didn't understand my message 100%. Well let me explain with some reference and example.
From the I-485 Standard Operating Procedure document.
When you file the I-485 then first Mail room does its review and then INS (USCIS) review it. Here is the step for reveiw in mail room by contractor
1. Sort envelope by received date.
2. Attach photos with the following priority
First place photo with I-131 (if filed)
Then place photo with I-765 (if filed)
Then place photo with I-485
3. Review correct fee
4. Review penalty fee (for 245(i) cases)
3. Review signature
4. Review eligibility (i.e. I-140 employment based, I-130 family based, I-360 religious worker etc)
5. Review visa number
5. Review location (i guess now it should be NCS, the document i refer is before bi specialization aug 2002)
6. Open Medical record (I-693)
I skip the I-131 and I-765 reveiw process
7. Data Entry
Then it comes to INS (USCIS) review
1. Review 245(i) penalty fee
2. Review reject criteria (e.g. signature, visa availability, I-140, I-130, I-360 etc)
3. Reveiw medical record
4. Review I-131 and I-765 (if applicable)
Then G-325A processing
Perform CIS (Central Index System) check to see if person already have A number. (In case of approved I-140 you already have A number)
If there are multiple A number then process thorugh CRU (Case Resolution Unit)
If there isn't any A number (such as for dependent) then assign one.
After G-325A processing perform Data entry into CLAIMS and then wait for adjudication. RAFACS records are created after data entry.
All files are staged in File Maintenance after they have been data entered and scanned.
When I-485 accepted then service center request for FD-258 (FBI Fingure print responses, background check etc)
FBI response may be IDENT (identical), Non-IDENT (Non identical), Reject (fingure print unreadable), Pending (conducting more search)
Then file is purged. Purging is a process by which INS identifies and resolve missing information prior to adjudication.
If visa petition is available the route the file to Workload Distribution (WD)
WD stage the files that had a visa number available at the time of filing; however, between the date of receipt and the date of adjudication, the visa became unavailable.
Check the Interview waiver criteria
If visa number is available, and application has all the required evidance then
recommond for approval.
Then INS (UCSIC) officer or contractor request the visa and continue for next step. When visa has been allocated the I-485 is ready to approve.
See from the simplied version of this step (the whole document is 269 pages long) the visa is acually allocted after recommonded for approval.
What does it means, that even if there are only 10,000 visa numbers are available in July, still 50,000 application can be filed because date will be current.
Thats what i wanted to say they will accept the application but it doesnt mean they will approve it. Approvable application means to pass the above criteria that date is current and filed with all the documents.
Well if you supposed that you will get visa number as soon as you file the I-485 then what will be the situation if 200,000 persons will file the employment based I-485 in July? Will they release one more visa bulliten in between?