▁a ▁passing ▁grade , ▁in ▁addition ▁to ▁various ▁exper ient ial ▁requirements ▁and ▁a ▁fee . ▁ ▁Register ed ▁Professional ▁Land man ▁( R PL ) ▁– ▁The ▁mid - level ▁design ation ▁offered ▁by ▁A AP L , ▁R PL ▁cert ification ▁distingu ishes ▁a ▁land man ▁as ▁knowledge able , ▁experienced ▁and ▁professional . ▁This ▁cert ification ▁level ▁requires ▁the ▁applic ant ▁to ▁be ▁spons ored ▁by ▁three ▁C PL ▁cert ified ▁individuals ▁and ▁complete ▁a ▁compreh ensive ▁pro ctor ed ▁test , ▁in ▁addition ▁to ▁various ▁exper ient ial ▁requirements ▁and ▁a ▁fee . ▁ ▁Cert ified ▁Professional ▁Land man ▁( CP L ) ▁– ▁The ▁highest ▁design ation ▁offered ▁in ▁the ▁energy ▁management ▁industry , ▁C PL ▁cert ification ▁is ▁the ▁standard ▁by ▁which ▁land men ▁demonstrate ▁their ▁compreh ensive ▁compet ence , ▁prof ic iency ▁and ▁professional ism ▁in ▁the ▁land man ▁field . ▁This ▁cert ification ▁level ▁requires ▁the ▁applic ant ▁to ▁be ▁spons ored ▁by ▁three ▁C PL ▁cert ified ▁individuals ▁and ▁complete ▁a ▁compreh ensive ▁pro ctor ed ▁test , ▁in ▁addition ▁to ▁various ▁exper ient ial ▁requirements ▁and ▁a ▁fee . ▁ ▁Notable ▁land men ▁ ▁Ind ividual s ▁who ▁began ▁their ▁career ▁or ▁worked ▁as ▁a ▁land man ▁include : ▁ ▁George ▁W . ▁Bush , ▁former ▁United ▁States ▁president ▁ ▁A ubre y ▁Mc Cl end on , ▁former ▁CE O ▁of ▁Ch es ape ake ▁Energy ▁ ▁The ▁father ▁of ▁oil ▁ty co on ▁T . ▁Bo one ▁Pick ens ▁