How would I find out what Acre spacing there is in my area for verticle wells

I have a vertical well drilled in Larimer Co. It was drilled with the perception that it was 40 acre spacing there is a total of 60 acres left. How would I find out the spacing requirement?

I think this may be what you are looking for:

http://cogcc.state.co.us/RR_Docs_new/rules/300Series.pdf

http://webapps2.rrc.state.tx.us/EWA/oilProQueryAction.do

This link will take you to the RRC oil proration unit query. Simply plug in the API of the existing well and search. Don't bother reading that pdf.