E-1 Visa requirements are guided by U.S. immigration statutes and regulations. But overall, it essentially boils down to experience.
There are many grey areas stipulated in the requirements that necessitate consular or USCIS officers to use their judgment when reviewing the application and supporting documents. Some consular and USCIS officers can be more difficult than others and at times adjudicate applications and review the supporting documents in slightly different ways. This variance in assessing applications can make a material difference in the approval process.
ImmigrationBusinessPlan.com has over a decade of experience dealing with E1 visa requirements. We will be happy to discuss your case and share what our experiences have been with similar cases as yours.