See also https://ccnso.icann.org/sites/default/files/field-attached/roles-responsibilities-council-24mar20-en.pdf

Customer Standing Committee (CSC):

• CSC appointments, regardless of whether members or liaisons, will be for a two-year period with the option to renew for up to two additional two-year terms. The intention is to stagger appointments to provide for continuity and knowledge retention. To facilitate this, at least half of the inaugural CSC appointees will be appointed for an initial term of three years. Subsequent terms will be for two years. (see: Charter)
• See https://www.icann.org/en/csc/members-liaisons

Root Zone Evolution Review Committee (RZERC):

The term of appointment shall be three (3) years. A member may be re-appointed for two additional terms (in total 3 terms). (see:  Guideline)

Empowered Community Administration:

The ccNSO representative will be appointed yearly (see:  Guideline)

ICANN Nominating Committee:

Each voting delegate shall serve a one-year term. A delegate may serve at most two successive one-year terms, after which at least two years must elapse before the individual is eligible to serve another term. (See: Bylaws)

Ethos Award Committee:

Councillors, serve for a year, two consecutive terms

Liaisons

The appointed Liaisons serves for a term of two years and no more than 3 (three) terms in a row. See relevant guideline

ICANN Fellowship Selection Committee

• See https://www.icann.org/fellowshipprogram
• The ccNSO appointed Selection Committee member will serve a two-year term, as detailed in Terms of Service.
• The ToR seems to imply re-appointments are not possible.
• See November 2020 Call for SOs/ACs to Nominate Fellowship Program Mentors and Selection Committee Members

ICANN Fellowship Mentor

• See https://www.icann.org/fellowshipprogram
• See November 2020 Call for SOs/ACs to Nominate Fellowship Program Mentors and Selection Committee Members