In last week, WA has introduced a new category that apply to some health-care sector occupations. WA state nomination has announced that following occupations are subject to the "Regional WA only category".
252711 Audiologist
253111 General Practitioner
254111 Midwife
254413 Registered Nurse (Child and Family Health)
254414 Registered Nurse (Community Health)
254415 Registered Nurse (Critical care and Emergency)
254422 Registered Nurse (Mental Health)
254423 Registered Nurse (Perioperative)
251511 Hospital Pharmacist
All the occupations that fall under the "Regional WA only" category must have an offer letter or the contract of employment from a regional area to be able to apply for Graduate stream or General stream. This condition is applicable to both the visas: 190 visa as well as 491 visa.
Following postcodes are considered as the regional areas for this category: 6041 to 6044, 6084, 6207, 6213, 6215 to 6537, and 6560 to 6770.
Source: https://migration.wa.gov.au/services/skilled-migration-western-australia/occupation%20lists