Thank you for your e-mail.
As a South Australian state nominated visa holder, as you signed a declaration in the course of your nomination application committing to migrating to and living in South Australia for at least two years, you are expected to live in South Australia for the first two years from date of your arrival in Australia. If you are only going to travel to Australia to validate your visa and then return to your home country, you do not register your arrival, as you have not arrived in South Australia to live and work. 如果只是短登，不需要跟南澳注册 As your 190 visa is for five years you may return to Australia at any time after the validation of your visa. You are also not required to live continuously in Australia, however if you are planning to live and work in Australia, as you made the two-year commitment to South Australia, Immigration South Australia expects state nominated visa holders to initially arrive in South Australia and look for work while based here in South Australia and not to live in another State first before moving to South Australia. 如果打算长期居住，建议去南澳生活和居住
In response to your questions regarding any other conditions, there are no restrictions with your 190 visa, while legally you Skilled Nominated 190 Visa allows you to live and work anywhere in Australia 对于190签证持有人实际是没有法律限制居住和工作地点的, you are reminded that nomination was granted on the basis that you committed to live and work in South Australia for the first two years. Through nomination from South Australia you were granted a permanent visa by the Commonwealth Department of Immigration and Border Protection (DIBP). 提醒申请人的签证是基于同意去南澳居住两年才获得担保的
There is no issue with your plans to go back to your country for extended periods to visit with your family, as once you have validated your visa, the only restriction on your 190 visa is it is valid for 5 years. Please note that any extended periods you spend out of the country will not be included in your two year commitment to South Australia, i.e. if you were returning to your home country for 4 weeks out of a 12 month period, this would be deemed an acceptable period of time for a holiday, however if you return to your home country for longer periods during the year, you would need to add the time spent out of the country onto the end of your two year commitment.对于两年居住，如果长期离开澳洲的这种不算入累计的两年内，如果是短期的离开，不影响累计居住年限计算，比如一年内有一个月的短期离开