Executive Rule No. 33 details the tax treatment for provisions for employee leaves. It establishes that a 30-day annual leave with full salary is allowable, provided the employee has completed at least nine months of service in their first year. The Rule specifies the calculation methodology, defining 'salary' to include the basic pay plus recurring allowances like accommodation and transport, but excluding reimbursements for work-related costs. It states that special provisions in contracts require prior Tax Department approval and exceptional cases must be consulted separately.