Modifying certain election campaign finance provisions; defining conduit fund under the ethics in government act; expanding certain reporting requirements relating to conduit funds and for legislative candidates signing spending limit agreements; prohibiting the acceptance of certain additional aggregate contributions by principal campaign committees of legislative candidates accepting public subsidies; modifying the allocation of money in the state elections campaign fund to candidates for constitutional office and eliminating allocations to candidates for the legislature; requiring and providing for state campaign finance and public disclosure board public subsidies for legislative candidates filing spending limit agreements and affidavits of contributions with the board; modifying certain spending limit agreement requirements; eliminating the income tax checkoff and political contribution refund programs for legislative candidates(ra)