The credit rating agency has also affirmed the '(P)Baa3' senior unsecured rating on the medium-term note (MTN) program of BPCL and the '(P)Baa3' backed senior unsecured rating on the medium-term note (MTN) program of BPRL International Singapore (BPRL). It has further affirmed the 'Baa3' backed senior unsecured rating of BPRL.