In carrying out mining exploration activities, PT Bukit Asam has qualified professional resources and has been internationally accredited, as follows:

KCMI - Competent Person Indonesia, Reserve Estimation from PERHAPI (Association of Indonesian Mining Professionals)

KCMI - Competent Person Indonesia, Resource Estimation from PERHAPI (Association of Indonesian Mining Professionals)

KCMI - Competent Person Indonesia, Resource Estimation from IAGI (Indonesian Geologists Association)

KCMI - Competent Person Indonesia, Exploration Results Reporting from PERHAPI (Association of Indonesian Mining Professionals)