Spanish to English Law/Patents Law: Contract(s)

I've read the posting on Antecedentes vs. declaraciones http://www.proz.com/kudoz/spanish_to_english/law_patents/574... but am interested in other opinions. As you know "antecedentes, declaraciones y clausulas" is of common use at the end of the first paragraph of Mexican contracts and agreements. I'm trying to avoid the old-fashioned use of whereas by using the heading "recitals" (for antecedentes), then simply list them without the word "whereas". But I wonder what to use for "declaraciones" when both "antecedentes" and "declaraciones" appear in the original document? Often, there is only one "antecedente" followed by the "declaraciones", appearing as follows:
"ANTECEDENTE(S)
SOLE. El (fecha) las Partes de este Convenio celebraron un Contrato de…"

(then the "declaraciones" appear usually made by "El Representante", almost always starting with):

"DECLARACIONES
I. EL REPRESENTANTE DEL XXX DECLARA QUE:
I.1 Su representada es una sociedad mercantil debidamente constituida…"
Thus I have a couple more questions:
1) could I translate "antecedentes, declarations y clausulas" as just "recitals and clauses", then for the heading, "ANTECEDENTE(S)" use the heading "BACKGROUND/INTRODUCTORY RECITAL(S)" and for "DECLARATIONS" simply "RECITALS"? which leads me to my next question.
2) If "declara" comes under "RECITALS", how to translate "declara" in "EL REPRESENTANTE DEL XXX DECLARA QUE"?
Maybe "RECITALS MADE BY THE ATTORNEY-IN-FACT OF XXX:"? or "THE ATTORNEY-IN-FACT OF XXX REPRESENTS THAT"?
Sorry for my long-windedness, probably a reflection on my confusion on the matter.