Complex sentence: An agreement was made with the Mexico Football Federation that CONCACAF competitions will remain top priority to play with their senior team, in exchange CONCACAF gave permission for the Mexican Football Federation to have representatives in the CONMEBOL-organised Copa Libertadores.
Split into simpler sentences: An agreement was made with the Mexico Football Federation that CONCACAF competitions will remain top priority to play with their senior team. In exchange, CONCACAF gave permission for the Mexican Football Federation to have representatives in the CONMEBOL-organised Copa Libertadores.