(Lake Oswego, OR)  --  The City of Lake Oswego will have a tax ready to impose on recreational pot, if its legalization is approved in November.  The City Council voted yesterday to impose the tax on both medical and recreational marijuana.  That's despite the fact that Measure 91, which would make recreational pot legal for those 21 and older, prohibits cities from passing their own taxes.  "The Oregonian" reports that city leaders are hoping the Oregon Legislature will consider amendments to the measure that would "grandfather" local marijuana taxes.