transitional
adjective
/trænˈzɪʃənəl/ ukusrelating to a process of change from one system, method, etc. to another:
Increases in the business rate are tied to inflation, but decisions over transitional relief and aid for small businesses have complicated the outcome.
Implementation of the recommendations would entail significant transitional costs for the least-developed countries.
a transitional administration/government
a transitional period/phase
transitional arrangements/measures/provisions