exhibit 4. 1 first amendment to the pooling and servicing agreement among wells fargo commercial mortgage securities, inc., as depositor, and wells fargo bank, national association, as general master servicer, and rialto capital advisors, llc, as general special servicer, and ncb, fsb, as ncb master servicer, ncb, fsb, as co - op special servicer, pentalpha surveillance llc, as trust advisor, wells fargo bank, national association, as certificate administrator, as tax administrator and as custodian u. s. bank national association, as trustee dated as of september 26, 2013 commercial mortgage pass - through certificates series 2013 - c12 first amendment to the pooling and servicing agreement this first amendment to the pooling and servicing agreement ( this “ amendment ” ) is hereby executed as of september 26, 2013 among wells fargo commercial mortgage securities, inc., as depositor ( the “ depositor ” ), wells fargo bank, national association, as general master servicer ( the “ general master servicer ” ), rialto capital advisors, llc, as general special servicer, ( the “ general special servicer ” ), ncb, fsb, as ncb master servicer ( the “ ncb master servicer ” ), ncb, fsb, as co - op special servicer ( the “ co - op special servicer ” ), pentalpha surveillance llc, as trust advisor ( the “ trust advisor ” ), wells fargo bank, national association, as certificate administrator, as tax administrator and as custodian ( the “ certificate administrator ”, the “ tax administrator ” and the “ custodian ” ) and u. s. bank national association, as trustee ( the “ trustee ” ). witnesseth : whereas, the parties hereto entered into a pooling and servicing agreement, dated as of march 1, 2013 ( the “ original agreement ” ), under which the depositor issued its commercial mortgage pass - through certificates, series 2013 - c12, and in which the parties wish to amend the master servicing fee rate with respect to certain mortgage loans listed on schedule i ( mortgage loan schedule ) to the agreement to be consistent with the related prospectus supplement. whereas, the execution of this amendment is permitted without the consent of the certificateholders or any of the non - serviced pari passu companion loan holders pursuant to sections 12. 01 ( a )