LEEA and ISO 17025

I'm not clear on what you mean by “cover” and am not knowledgeable about what membership to the Association entails. ISO/IEC 17025 is the international standard that sets out the general requirements for the competent, impartial, and consistent operation of laboratories. Membership and or certification by a sector specific association typically involves the member meeting a level of compliance and competency based on the associations their standards of practice.  This provides confidence in the organization but does not equate to certification to an ISO standard such as ISO 9001 nor accreditation to ISO 17025, the competency standard for calibration and testing laboratories. There may however be processes and documentation that you have in place that could be built on if you wish to implement ISO 17025.

For more information on ISO 17025, see What is ISO 17025? at https://advisera.com/17025academy/what-is-iso-17025/ and the white paper
Clause-by-clause explanation of ISO 17025:2017 available at https://info.advisera.com/17025academy/free-download/clause-by-clause-explanation-of-iso-17025