Relating to forest products harvest taxation; prescribing an effective date; and providing for revenue raising that requires approval by a three-fifths majority.

Extends biennial privilege taxes on merchantable forest products harvested on forestlands. Directs Legislative Assembly to use data from quarterly economic and revenue forecast released in February of each odd-numbered year when determining ] begin considering biennial forest products harvest tax rates not later than March 10 of each odd-numbered year . Requires State Forestry Department to provide Legislative Revenue Officer or Legislative Fiscal Officer with timber harvest data upon request for purpose of determining biennial forest products harvest tax rates ] such consideration . Imposes additional privilege tax on merchantable forest products harvested on forestlands. Directs revenues to be used to fund mitigation of effects of forest practices on aquatic species. Makes additional privilege tax conditional and temporary and caps collections at $250 million of revenue. Takes effect on 91st day following adjournment sine die.