To be eligible to take the ARE will depend on the state in which you are seeking licensure; you need more than just an accredited degree.
Typically, if an architecture program has been offered candidate status, the program is meeting the standards set by NAAB and is expected to obtain full accreditation when it graduates its first class. Programs time their gaining accreditation to when the first class graduates.
However, as stated below - a graduate from a candidate program is considered to have met the NCARB Education Standards for purposes of meeting the Education standard.
Before attending a candidate program, I would ask questions related to their timeline on gaining accreditation.
In order to satisfy the education requirement for NCARB certification, you must hold a professional degree in architecture from a program accredited* by NAAB, a professional degree in architecture from a program accredited* by the Canadian Architectural Certification Board (CACB), or a CACB-certified professional degree in architecture from a Canadian university.
NAAB is the only agency authorized to accredit professional degree programs in architecture in the United States. Although graduation from a NAAB-accredited program does not guarantee registration, accreditation is intended to verify that accredited programs achieve education standards established by NAAB in collaboration with the four collateral organizations—theAmerican Institute of Architects (AIA), the American Institute of Architecture Students (AIAS), the Association of Collegiate Schools of Architecture (ACSA), and NCARB.
* The program must have been accredited no more than two years after the graduation date.