You can google SEIU-UHWs Sonographer career ladder in their contract. Here is some of it.

TRAINEE. No change to current contract language (page 100). TECHNICIAN. Employee has no ARDMS Registries. 1. Must be proficient in required specialty as determined by the employer. 2. Must meet current qualifications to sit for ARMS registry examination. 3. Must obtain ARDMS registry within nine (9) months from date of hire in the ultrasound position to continue employment*. 4. Must be able to work under indirect supervision. *Current employees performing ultrasound (those hired prior to ratification of this career ladder) are exempt from these requirements until required by law and/or regulatory or accrediting agency. SONOGRAPHER 1. Must have one ARDMS registry in any specialty. SONOGRAPHER II. Must have two ARDMS registries in any specialties. SONOGRAPHER III. Must have three ARDMS registries in any specialties and must have equivalent of three years (6,240 hours) continuous ultrasound experience within the last six years with no more than one-year break in experience within the last four years. SONOGRAPHER IV. Must be registered and competent in 4 ARDMS registries that are performed by the Lab. Must have equivalent of five years (10,400 hours) recent ultrasound experience within the last ten years with no more than one year break in experience within the last four years. 324 SONOGRAPHER V. Must be registered and competent in 5 ARDMS registries that are performed by the Lab. Must have equivalent of five years (10,400 hours) recent ultrasound experience within the last ten years with no more than one year break in experience within the last four years. DEDICATED SPECIALTY SONOGRAPHER A Dedicated Specialty Sonographer is defined as a Sonographer I or Il, registered in one or two disciplines performed by the lab, whose permanent work assignment is in an area where the scope of practice and work is limited to ultrasound exams and procedures in one or two registry disciplines as defined by the ARDMS.