While section 2 expressly provides for an enumeration of persons, Congress has repeatedly directed an enumeration not only of the free persons in the States, but also of those in the territories, and has required all persons over eighteen years of age to answer an ever-lengthening list of inquiries concerning their personal and economic affairs. This extended scope of the census has received the implied approval of the Supreme Court;[136] it is one of the methods whereby the national legislature exercises its inherent power to obtain the information necessary for intelligent legislative action. Although taking an enlarged view of its power in making the enumeration of persons called for by this section, Congress has not always complied with its positive mandate to reapportion representatives among the States after the census is taken. It failed to make such a reapportionment after the census of 1920, being unable to reach agreement for allotting representation without further increasing the size of the House. Ultimately, by the act of June 18, 1929,[137] it provided that the membership of the House of Representatives should henceforth be restricted to 435 members, to be distributed among the States by the so-called "method of major fractions" which had been earlier employed in the apportionment of 1911. Clause 4. When vacancies happen in the Representation from any State, the Executive Authority thereof shall issue Writs of Election to fill such Vacancies. Clause 5. The House of Representatives shall chuse their Speaker and other Officers; and shall have the sole Power of Impeachment. Section 3. Clause 1. [The Senate of the United States shall be composed of two Senators from each State, chosen by the Legislature thereof, for six Years; and each Senator shall have one vote]. Clause 2. Immediately after they shall be assembled in Consequence of the first Election, they shall be divided as equally as may be into three classes. The Seats of the Senators of the first Class shall be vacated at the Expiration of the second Year, of the second Class at the Expiration of the fourth Year, and of the third Class at the Expiration of the sixth Year, so that one third may be chosen every second Year; [and if Vacancies happen by Resignation, or otherwise, during the Recess of the Legislature of any State, the Executive thereof may make temporary Appointments until the next Meeting of the Legislature, which shall then fill such Vacancies].[138] Clause 3. No Person shall be a Senator who shall not have attained to the Age of thirty Years, and been nine Years a Citizen of the United States, and who shall not, when elected, be an Inhabitant of that State for which he shall be chosen. Clause 4. The Vice President of the United States shall be President of the Senate, but shall have no Vote, unless they be equally divided.