Again, the rules need to be explained more clearly. There are, essentially, four types of CBRS Device:
#1: A Category A CBSD operates indoors, at up to +30 dBm/10 MHz EIRP, or in some cases may be outdoors, but think "park", not "WISP". IT MUST REGISTER WITH THE SAS. it may or may not need CPI, depending on how good its geolocation is, but in practice I expect it to need CPI all the time, because GPS doesn't have the required vertical accuracy. (That is, you can only waive CPI if you can get some unobtanium.)
#2: A Category B CBSD only operates outdoors, at up to +47 dBm/10 MHz EIRP. It needs CPI and SAS, always.
The original rules allowed a Category A CBSD to use a SAS without ESC (Environmental Sensing Capability, essentially a network of radar detectors feeding the SAS) outside of a fairly large coastal zone. That has been changed. Now, ESC is still needed in coastal zones but it doesn't matter if it's CatA or CatB, and it's based on whether the SAS it's attached to has ESC for the particular offshore zones called Dynamic Protection Areas (DPAs) that the CBSD may be impacted by. The "big three" (note -- mobile-friendly, not WISP-friendly) initial SASs have just gotten ESC approved. Other SASs coming down the line may not have access to ESC; that's to be seen.
#3: An End User Device (EUD) is a client of a CBSD base station, fixed or mobile, capped at +23 dBm/10 MHz EIRP. Think "cell phone". It is invisible to the SAS; it only transmits when and where it is authorized by a base station CBSD, and that's what the SAS authorizes. No CPI is involved.
#4: A CPE-CBSD is a special case of EUD that is allowed to operate at >+23 dBm/10 MHz EIRP because it is also a CBSD, registered with a SAS. The SAS fee for these will be lower than for a base station but usually not zero. Typically this will be a device with a high gain antenna, like a CBRS 450B. Approval processes for these are being worked out now and none are fully authorized yet. These are typically going to be Category B outdoor devices and WILL require CPI. BOTH the base station AND the CPE-CBSD will thus need to be authorized for the same frequency.