...
default_address[customers_lastname] required minl:2 maxl:50 capital alpha_ext
default_address[customers_dob] required
cust_info[customers_email_address] required email lower minl:6 maxl:75
...
...
default_address[customers_lastname] required minl:2 maxl:50 capital alpha_ext
default_address[customers_dob] required
cust_info[customers_email_address] required email lower minl:6 maxl:75
...