Can I extend my 60-day tourist visa early in Pattaya?

A user inquired about the possibility of extending a 60-day tourist visa in Pattaya before its expiration. Comments clarified that Jomtien Immigration allows applications for a 30-day extension only during the final week of the current visa, whereas most other immigration offices permit applications up to 30 days before expiration. Additionally, a TM30 form is required when applying for the extension at Jomtien.