(a) The State of Arkansas consents to the purchase by the United States of a site for public buildings mentioned in 17 Stat. 280, Ch. 324, and cedes jurisdiction to the United States over any lot, parcel, or block of ground within the corporate limits of the City of Little Rock, not exceeding in area three hundred feet (300') square, which may be purchased by the United States as a site for a building for the accommodation of the United States circuit and district courts, post office, internal revenue, and other government offices, under 17 Stat. 280, Ch. 324.
(b) The state releases and relinquishes its right to tax the site and all improvements which may be thereon during the time the United States remains the owner thereof, except that this cession of jurisdiction shall not prevent the execution of any process of this state, civil or criminal, on any person who may be on such site.