I manage facility construction projects for a nation wide processing company, When working out of my home state I claim Hi/Low per-deim. I now for the first time am working on a project in my home state, and near the corporate offices of the company I work for, the location however is still 4 hours from my home so I do need to travel, rent lodging, etc.
Can I/my employer, use/claim the hi low per-diem? Is the rule governing per-diem based on location of work in relation to Employers offices or my home address? Or is there some middle ground in this unique situation, i.e. I travel for all my work, this job just happens to be near corp. office. So far I've found nothing on the IRS website that addresses this.

Thanks