The club allowed the number eight to feature for Wales in their final autumn international match against South Africa on December 2, a game that fell outside the IRB's allotted window.
Premiership Rugby raised the issue in the aftermath and Bath have now confirmed they have been fined £60,000 for the call.
Chief executive Tarquin McDonald confirmed the news on the club's website, admitting: "We understand Premiership Rugby's position on this, and have subsequently worked proactively with them to swiftly achieve a fair resolution.
"We believed this situation would change, that has not yet happened and we have therefore come to an appropriate settlement with Premiership Rugby.
"However, we continue to believe that there is appetite for change and that this on-going conflict between the club and international calendars is not good for players, clubs or unions. We continue to support the objective of a solution for the separation of club and international calendars in a way which benefits players, clubs and unions, and brings an end to situations such as this."