Police does not have the power to bail in these sections .
When you have AB than how you can apply for Regular Bail , because this type of bail is possible only after arrest .
You well joined the investigation and police quaries and returned articles according to court instructions , you have valid ground to apply with the session court to extend or for permanent ( till the charge is not framed ) the period of your AB. You can produce all the documents ( join report to investigation , return articles reciept etc ) . I feel you will get extention in you present AB.