Thanks for your explanation, Lazaros.
My question was no so technical. A CCNP lesson telling about CCNA scope ; I thought, it’s Copy/Paste error. Now, I understand that one lesson can belong to CCNA and also be re-used, without any change, in CCNP or CCIE courses. I found below the three (CCNA, CCNP, CCIE) links having the same NAT lesson (the lesson that was originally written for CCNA).
…/ccna-routing-switching-icnd1-100-105/how-to-configure-dynamic-nat-on-cisco-ios-router/
…/ccnp-route/how-to-configure-dynamic-nat-on-cisco-ios-router/
…/ccie-routing-switching/how-to-configure-dynamic-nat-on-cisco-ios-router/