No. 8. declaration against "necklacing". No. 9. prohibit assistance to businesses owned by those who have participated in violence. No. 10. prohibit assistance to housing of black employees of U.S. Government who have participated in violence. No. 11. adds to the Sullivan code of conduct. No. 12. prohibits issuing of visas to South African nationals known to be Communists or terrorists. No. 13. conditions termination of provisions upon certain actions of the African National Congress. No. 14. requires the President to report to Congress on the extent of Communist infiltration in antiapartheid group. and No. 15. any combination of the above amendments.