and where can I find century codes for these charges
These charges appear to be federal, not state, and there are no century codes for federal offenses. Nonetheless, the charges are violations of 21 U.S.C. §§ 841(a)(1) and 846, and the penalties are prescribed in 21 U.S.C. § 841(b)(1)(viii), which may be found here: http://tinyurl.com/bpc6cwt; and if you're interested, the State of North Dakota Century Code can be found here: http://tinyurl.com/bl539we.
Joshua Sabert Lowther, Esq.*
NATIONAL FEDERAL DEFENSE GROUP
*also admitted in the US District Court for the District of North Dakota