Provided always and be it further enacted that the Comissioners within any County or Place within their respective limitts or the major part of them shall tax and assesse every other Co[m]missioner joyned with them and the Co[m]missioners within their division shall assess every Assessor within their division and as well all su[m]ms upon every of the said Co[m]missioners and Assessors as the Assessments made and presented by the Presented as aforesaid shall be written estreated levied and gathered as the same should and ought to have been as if the said Co[m]missioners had not been named Co[m]missioners.