This is the 13232nd most frequent Spanish word.
promulgada
Promulgada: promulgated; formally announced or enacted.
In this sentence, 'promulgada' is used as a past participle of the verb 'promulgar', indicating that the law has been formally declared and enacted by an official body, in this case, the congress.
La ley fue promulgada por el congreso ayer.
The law was enacted by the congress yesterday.
'Promulgada' here modifies 'reforma' as an adjective, describing a reform that has been officially enacted or declared.
La reforma promulgada busca mejorar el sistema educativo.
The enacted reform aims to improve the educational system.
In this context, 'promulgada' again acts as an adjective, specifying that the resolution has been officially issued or adopted by the United Nations.