La parte objetante dispone de un plazo de quince días hábiles para presentar su objeción.The objecting party has fifteen working days to submit their objection.
This means that the noun can be masculine or feminine, depending on the gender of the noun it refers to (e.g., el doctor, la doctora).
El tribunal entiende que la norma infringe los derechos legales del objetante.The court understands that the rule infringes the objector's legal rights.