When a nurse/midwife becomes incapacitated as a result of critical illness or serious physical injury, and has supporting medical evidence for an extended period of sick leave, the individual may, on an exceptional basis, be granted paid sick leave extended as follows:

• A maximum of 183 days on full pay in the previous rolling   
  one-year period.
• Followed by a maximum of 182 days on half pay in the previous rolling one-year period.
• Subject to a maximum of 365 days paid sick leave in the
  previous rolling four-year period.