Sorry FiXato, I should have explained for you. The module ns_require is a module that require people to identify or register their nick if not done earlier. If they not do, they'll get killed after 90 sec.
When I tested it on UltimateIRCd2.8.8 and 2.8.9 it came up a message when I connected that said:
"You must REGISTER or IDENTIFY with NickServ when using this network."
#define dCNOTICE3 "Users that do not register or identify within 90 secs of connecting"
#define dCNOTICE4 "will be subject to a ban from using this network."
However, not really sure what #define dCNOTICE3 and 4 means.