What the outlet published · Sentence 4
“El Frente Polisario ha asegurado que emprenderá las acciones que 'se estimen oportunas' en caso de no procederse a su realización 'dentro de un plazo razonable'.”
Translation · ES
The Polisario Front has said it will take whatever action is "deemed appropriate" if this is not carried out "within a reasonable period".
What this claims, in our words
THE THREAT ON THE TABLE: unspecified action if the poster is not removed. Vague by nature, and recorded here as what was said, not as a prediction.