The Office of National Drug Control Policy’s (ONDCP) Circular, Accounting of Drug Control Funding and Performance Summary, requires each National Drug Control Program agency to submit to the ONDCP Director a detailed accounting of all funds expended for National Drug Control Program activities during the previous fiscal year. CBP’s management was unable to provide supporting documentation for the drug control methodology used to estimate the percentages of obligations allocated between interdiction and intelligence. These percentages are used to derive the dollar-value of obligations reported as Drug Resources by Budget Decision Unit and Drug Control Function in the Table of FY 2018 Drug Control Obligations presented in CBP’s Detailed Accounting Submission.