"Employment" and "carry on a vocation" include employment that is full-time or part-time for a period of time exceeding 14 days or for an aggregate period of time exceeding 30 days during any calendar year, whether financially compensated, volunteered, or for the purpose of government or educational benefit.
"Extended visit" means a period of visitation for any purpose in the Commonwealth of 30 days or more.
"Student" means a person who is enrolled on a full-time or part-time basis, in any public or private educational institution, including any secondary school, trade or professional institution, or institution of higher education.
Va. Code § 9.1-905