Membership with ICOH SCTF requires membership in ICOH. You may apply here:

Thereafter, you may apply to join this Scientific Committee by submitting an application with the ICOH Secretariat-General with the endorsement from any 3 incumbent members. 

*Please note that membership fees are prorated respective to the length of the triennial term remaining, i.e., members applying in 2019 need only pay for 2/3 of the triennial membership fees.