Query on Extension of Articles

Just get 108 (completion) signed and send it.. Once you receive the confirmation, join some other CA (102 and 103). He has to sign 108 anyhow, he can just insist or maybe persuade to sign 107 (supplementary), just cook up something and postpone signing and sending of 107. You can also say you asked institue and got response that, it is required to recieve 108's confirmation first, then 107 is to be sent.

Now there is nothing like CA refusing to terminate once the original term ends. The original agreement period has terminated as it has been completed.