A traveler to Australia might need a brief respite after arrival due to the distance it has taken to travel to the Continent. Some travelers might be groggy and feel out of sorts for a day or two because of the time differences involved, and the traveler might not be clear on what they are allowed to bring into the country and what is strictly prohibited. Plants and plant by-products require a quarantine period which might slow travelers down considerably. The shopping hours throughout Australia are generally 9:00 a.m. to 5:00 p.m., but in some locations, there are opportunities to shop on Saturday and Sunday and that choice is left up to the specific retailer. The customary enjoyment of tobacco while shopping is not tolerated in any store or restaurant and smoking on any type of public transportation or building is considered to be very unacceptable conduct. There is a variety of transportation modes available throughout Australia. A traveler can get great bargains on bus tickets if they participate in discount card programs. There are terrific discounts for travelers with this type of membership because the discounts extend to tours at public buildings, amusement parks and arcades and many fine dining opportunities. Visitors to Australia have free sightseeing trips that they can enjoy. While shopping Australia for many items, there are some tipping rules that will make the shopping go smoother. While dining with friends at lunch or dinner, it is customary to tip all servers and wait staff at least 10 percent of the final bill, and tip the people who help along the shopping path such as porters at hotels and taxi drivers who speed travelers to their next shopping destination. Taking advantage of many travel discounts will be high on every travelers list. A visitor to Australia will have to be mindful of the time changes throughout the Continent that could have a direct effect on scheduling a vacation or a daily shopping excursion to other parts of the Continent that have not been visited yet. The time changes, in conjunction with the air travel fatigue, might overcome older travelers. It is always a good idea to keep the time factor, and time schedules for transportation and retail locations handy at all times. When planning vacation trips to any foreign countries, there are many entry rules that will apply. In order to enter the Continent of Australia, travelers are required to have a valid passport on them at the point of entry, and some people run into difficulties because they do not have a visitor visa or student visa to present with the passport. The only exceptions to the two-document rule apply to natives of Australia and those that hold passports from New Zealand. Duty-free shopping is encouraged at all major airports throughout the world. For travelers that plan to visit Australia, there are rules that apply to duty-free items that arrive with the passenger at the point of entry. Travelers must declare any foreign currencies that they enter Australia with, and remember to declare tobacco products too because there is a certain limit allowed for each person that travels. Age limits will apply to travelers who bring duty-free items into Australia too.