Applicable to Carteret County only, amends GS 105-472 to modify the per capita method used for the allocation and distribution of local sales and use tax proceeds to the county to include the county's seasonal population. Provides for calculation of the county and its municipalities' seasonal population, requires the Secretary of Revenue (Secretary) to use estimates provided by the county in its resolution adopted choosing the per capita method for tax allocation and distribution, calculated annually based on the number of rental properties, occupancy rooms, and campsites, multiplied by the average maximum capacity for each type of accommodation rental, plus an estimate of guests of permanent residents. Requires the county to keep records of the methodology, calculations, and sources of data used in determining the seasonal population estimates for three years, subject to Secretary inspection. Makes conforming changes regarding required resolution content. Specifies that the resolution estimates for seasonal population of the counties and its municipalities are final and not subject to review. Provides for the method of distribution and the previous seasonal population to control if the board of county commissioners fails to adopt a resolution choosing a method not then in effect in the county, fails to update the seasonal population estimates, or if a certified copy of the resolution is not timely delivered to the Secretary. 

Authorizes the Secretary to retain the Department of Revenue's administration costs of up to $75,000 from the county's allocation of tax as reimbursement to the Department for the first fiscal year the county elects the seasonally-adjusted per capita method of distribution of local sales and use tax.