Below is a summary of the Right of First Refusal section per the Transwestern 
tariff.

Contract qualifications:
executed contract prior to 03/27/00 with term of 1 year or longer
executed contract on or after 03/27/00 with term of 1 year or longer at max 
rate

Shipper notification:
6 months prior to contract expiration if term is 2 years or less
1 year prior to contact expiration if term exceeds 2 years

Posting:
pipeline will post within 10 business days
bidders have 1 month for submittals
shipper has up to 2 weeks to match