Amending and supplementing a number of articles of the Regulation on lower and upper complementary secondary graduation examinations, promulgated together with the Education and Training Minister’s Decision No. 18/2002/QD-BGDDT of April 8, 2002, which was amended and supplemented by Decisions No. 46/2002/QD-BGDDT of November 12, 2002, No. 12/2004/QD-BGDDT of April 28, 2004, and No. 20/2006/QD-BGDDT of May 11, 2006