A formal expression indicating the occasion or time when something happens — akin to 'on the occasion of', 'at the time of', or 'when'; commonly used in writing and formal contexts.
入学に際して、必要な書類をすべて提出してください。
Upon enrollment, please submit all required documents.
就任に際して社長は社員に向けて挨拶を述べた。
On the occasion of his inauguration, the president gave a greeting to the employees.
海外出張に際して、ビザの確認を忘れないでください。
When going on an overseas business trip, don't forget to check your visa.