Discounted tickets are available for senior citizens (above 60 years) and some other categories of passengers including the disabled, students, athletes, persons affected by serious diseases, or persons appearing for competitive examinations. One compartment of the lowest class of accommodation is reserved for women in every passenger-carrying train. Some berths or seats in sleeper class and second class are also reserved for women. Season tickets permitting unlimited travel on specific sections or specific trains for a specific time period may also be available. Foreign tourists can buy an Indrail Pass, which is modelled on the Eurail Pass, permitting unlimited travel in India for a specific time period.