The government is claiming that the agency will provide better, more cost effective service to the public, to business, to the provinces and territories by bringing about tax harmonization with the provinces and therefore huge tax savings resulting from the elimination of such things as duplication and overlaps in tax administration among various levels of government.
The government agency will not allow duplicated taxes
The aim of the government agency is to not allow duplicate or overlapping taxes. 
( z1 allow :polarity - :ARG0 ( z2 agency :mod ( z3 government-organization :ARG0-of ( z4 govern ) ) ) :ARG1 ( z5 tax :ARG1-of ( z6 duplicate ) ) )