Phetchaburi, 45 days before expiration date ?

[The Theory]

I need to be in LA about 40 days before my extension expiration date. 

Can I renew my extension 45 days before expiration date (Phetchaburi province) ?

I have already done that in CM and BKK (45 days before), but this is my 1st extension in Phetchaburi province. 

[khm2412]

I was advised at Tha Yang that they would extend 45 days ahead of the expiry date, but this was three years ago, so worth checking again.