Section 100 of chapter 32 of the General Laws, as appearing in the 2010 Official Edition, is hereby amended by inserting after the word “death”, in line 22, the following words:- provided, however, that for the purpose of any payment on or after December 1, 2010 the term amount of pension shall in no case be less than the full salary payable to a police officer in the next grade-step (in the case of a deceased police officer) or a firefighter in the next grade-step (in the case of a deceased firefighter) while employed by a department or uniformed force on the date of such employee's death. Provided further that for the purpose of any payment on or after December 1, 2010, the term amount of pension shall in no case be less than the earnings that would have been payable to a police superior officer were he or she in the next grade-step of a supervisory position (in the case of a police superior officer deceased on or after December 1, 2010 who had been appointed to and was serving in such a supervisory position) or payable to a fire officer were he or she in the next grade-step of a supervisory position (in the case of a fire officer deceased on or after December 1, 2010 who had been appointed to and was serving in such a supervisory position) employed by a department or uniformed force on the date of such employee's death.