Complex sentence: Each State and territory of Australia has its own independent State Emergency Service (SES), VICSES is only one of these services spread across Australia at times of great need or catastrophic disaster, it is common that help be sought from other states.
Split into simpler sentences: Each State and territory of Australia has its own independent State Emergency Service (SES), VICSES is only one of these services spread across Australia. At times of great need or catastrophic disaster, it is common that assistance be sought from other states.