How to determine if the G1CPFDF file definition is required in CICS for CODE-1 Plus

Operating System: z/OS
Products Affected:  CODE-1 Plus
The site customization file (G1CPFDF) is an updateable indexed file for use with the interactive system (G1CP transaction). If you plan on modifying default initialization and processing values for your site, you need to install the customization file. Otherwise, the interactive system will function with the default match settings and processing on entry to and exit from the CODE-1 Plus software.
UPDATED:  September 11, 2017