The Michigan Daily-Friday, July 25, 1980-Page 5 Ti seb plan denounced by F erency 4 y Vietnamese offensive sends Pol Pot troops retreating ARANYAPRATHET, Thailand (AP) -After pounding defenders with an all-night mortar and rocket barrage, Vietnamese troops yesterday captured t the Malai Hill stronghold of Pol Pot's guerrillas, Thai military sources said. It was a key victory in Hanoi's cam- paign against the ousted Cambodian leader. Vietnamese forces backed by tanks and artillery capped their month-long battle for Malai Hill with an assault that forced the guerrillas to retreat more than a mile farther south into Cambodia, the sgurces said. NO CASUALTY FIGURES were available and it was not known if the Vietnamese pursued the guerrillas to their new stand in another hilly frontier area. The Vietnamese offensive was aimed at crushing the guerrilla resistance, which has peristed since Vietnam for- ced the communist Pol Pot out of Phnom Penh in January 1979 and in- stalled the pro-Hanoi communist regime of Heng Samrin. The Pol Pot soldiers-said to number about 40,000-pursue a guerrilla-style war that calls for retreats when out- numbered and attacks when the enemy is weak. MORTAR FIRE FROM the Cam- bodian border battle area south of this town fell in Thailand, wounding three Thai soldiers and two villagers Thur- sday, the sources said. The Thai military said Vietnames bombarded the area around 1,000-foot- high Malai Hill with rockets and mor- tars throughout the night Wednesday and gained control Thursday. Thai troops at the border were aler- ted against a spillover of the fighting in- to Thailand in areas of the frontier where sporadic shellings have followed the June 23 Vietnamese offensive. The start of the offensive, north of Aranyaprathet in an area controlled by various anti-communist "Free Khmer" groups, brought Vietnamese into Thai territory and prompted a speed-up of U.S. military aid to Thailand. LANSING (UPI)-The Tisch tax-cutting amend- ment is constitutionally defective and should be kept off the November ballot, attorney Zolton Ferency told election officials yesterday. In a related development; legislative figures said it is highly unlikely lawmakers would take advantage of an apparent loophole which would enable them to raise taxes in the period after the amendment passed but before it took effect. FERENCY, A MICHIGAN State University professor of criminal justice and former guber- natorial candidate, has asked Secretary of State Richard Austin, the Board of State Canvassers and Elections Director George Herstek to keep the proposed amendment off the ballot on the grounds it fails to outline all sections of the state Constitution it would alter. The tax-cutting amendment proposed by Shiawassee County Drain' Commissioner Robert Tisch and the Constitution "just don't jive," Ferency said. IF APPROVED BY voters, the Tisch amendment would cut property assessments in half while giving the state little means of making up lost revenue. In his letter to Austin, Ferency said the Tisch petitions "fail to state the existing provisions of the Constitution which would be altered or abrogated by such proposal if adopted." The canvassers are in the process of certifying the 410,000 signatures Tisch submitted to place his proposal on the November ballot. Ferency said he will take his challenge to court if the board, Austin or Herstek refuse to invalidate the amendment. Herstek said no action would be taken on Ferency's request for several weeks. Ferency said the Tisch amendment requires 60 per cent voter approval for passage of a tax increase without altering a constitutional provision allowing referendums to pass on a simple majority. AT SCHLUMBERGER