Your 97 CL should have DAS X. There is a RFID chip in the housing that communicates with a small black box behind the instrument cluster. This box sends a signal to the engine computer allowing the injectors to operate. The car will start before the key is pinged so there isn't a delay in normal operation but will shut off in a few seconds with an incorrect key.

Once the car is running, the system writes a new code to the key and looks for that code next time.

For this system, there are china readers / burners in the sub $ 100 last I checked. They require unsoldering the MCU chip to read the memory. You will also need to get blank PFC 7930 chips.

The key housings are on e bay too ( $ 12 ? ) The housings come apart because someone turns the key from the end rather than at the key bit side.