Decree No. 28/2011/ND-CP dated April 14, 2011 of the Government amending and supplementing the list of enterprises employees of which may not go on strike promulgated together with the Government’s Decree No. 122/2007/ND-CP dated July 27, 2007, providing for the list of enterprises employees of which may not go on strike and the settlement of requests of labor collectives in those enterprises