The license assessment established by this Chapter for hotel management activities in the Portland Tourism Improvement District for a license year shall be calculated as follows:
A. Gross rent charged by the hotel;
B. Minus rent received from any occupant for a stay of more than 30 successive calendar days (rent derived from stays by a person who pays for lodging on a monthly basis, irrespective of the number of days in such a month, shall also be subtracted);
C. Minus rent received from stays by any person housed through an emergency shelter or disaster program where the rent is paid with government assistance funds; and
D. Minus rent received from stays by any Federal Government employee traveling on official government business, who presents an official Government Exemption Certificate or official travel authorization.
E. Multiplied by .02 (two percent).