The server SHALL be able to parse and evaluate all spatial operators encoded as a text string that validate against the BNF production fragments identified in the Advanced Comparison Operators requirements class.
This is the only remaining place that spatial operator is used, so probably spatial functions should be used instead.
https://docs.ogc.org/DRAFTS/21-065.html#cql2-text
In Requirement 22:
This is the only remaining place that spatial operator is used, so probably spatial functions should be used instead.
@pvretano @cportele