Multi-site development organizations require coordination and communication efforts between different sites to ensure successful distributed development. These efforts need to be guided by a set of principles and statements on the software architecture that must be complied with throughout the organization: architectural rules. It is of paramount importance that multi-site development organizations incorporate measures in the architecting process to secure compliance with these rules throughout the organization. We describe a method to assess the degree to which compliance measures are secured in multi-site development organizations. We share our experience in applying this method in a large development organization in the consumer electronics domain.