SECTION 1. Section two of Republic Act Numbered Sixteen hundred seven is amended to read as follows:
"SEC. 2. The City Engineer of Manila, with the cooperation of the National Planning Commission or its successors, shall draft the necessary plans for the widening of streets in the Walled City as hereinbelow specified:
"Cabildo, which is hereby declared a national road, shall be 30 meters wide with arcade of 4.70 meters; General Luna and Magallanes, 17 meters wide; and Real, 21 meters wide with arcade of 3.80 meters."