Question juridique clé
Whether the refusal to disclose the 1998 tax file violated the right to be heard.
Solution extraite
No. The missing 1998 file caused no prejudice because the relevant prior decision was in the record and the taxpayer already knew the authority had changed its practice.
Motifs extraits
Access to the 1998 file was unnecessary for challenging the 1999/2000 assessments; the taxpayer could understand and contest the new strict application of the rule without it.