If you are over the age of 21, you do not have to submit to the standardized field sobriety tests or PAS test. You must submit to either a breath, blood or urine test at the station. Failure to do so will result in an automatic 1 year suspension of your driver's license as a result of your refusal.
If you are under 21, you do not need to submit to the standardized field sobriety tests; however, you must submit the PAS test. You will also have to submit to either a breath, blood or urine test at the station.
There are some additional things you need to know about a DUI/DWI accusation. A charge of DUI/DWI in California has two different aspects. First, there is the criminal case you must deal with in court. Second, there is the case the DMV will build against you for the DUI/DWI charge. That is, you are facing both criminal and civil charges. That is why you need an attorney that will handle both aspects of your DUI/DWI.
In order for a police officer to stop you, the officer must have probable cause. Probable cause can be enough as a simple vehicle violation like speeding. The right attorney will review all of the evidence the prosecution has against you and determine whether the stop was legal. If I don't believe that the officer had probable cause to stop you, then I will file a motion in court to suppress the evidence and seek to have your case dismissed.