Appreciate the responses. Additionally, the Office of the Superintendent for WA schools responded quickly. I include portions of the responses below and highlight it comes down to the districts involved (similar to Dan's response).
There appear to be two options: 1) Inter-district agreements and 2) Choice agreements. In summary, Inter-district policy appears to be set agreement with specific constraints including the number of people admitted each year as non-residents. Choice appears to be an aspect of the No Child Left Behind Act with similar but different regulation for when the choice will be approved. Regulation also initiates at the district level. Each type has different fiscal and educational responsibility implications for the school districts involved with the main difference being choice is a complete transfer of the student and responsibility, per my assessment.
To Ardell's point, extenuating circumstances must exist such as a lack of curriculum in the home/resident district (e.g. Internet Academy or Skills Center per the reference below).
"I would refer you to Bulletin #009-09 which outlines OSPIâ€™s guidance on â€œChoiceâ€ and â€œInter-Districtâ€ agreements. The link to this bulletin is here: http://www.k12.wa.us/BulletinsMemos/bulletins2009/B009-09.doc.
In most cases, a resident district will release under a â€œChoiceâ€ agreement a student 100% to attend another school district. And provided that there is available space at the â€œChoiceâ€ school, the new district would sign off on the agreement."
â€œA resident of a school district is eligible to enroll in the school provided that they are at least age of 5 and under the age of 21 at the beginning of the school year, and has not met the school districtâ€™s graduation requirement.
Students in most cases attend the school in the attendance area (i.e., the neighborhood school). Each school district should have established procedures for students wishing to transfer to another school within the school district or to transfer to another school district.â€