The phrase "necessary visas" refers to the specific and required permits you need to enter and stay in a particular country. These visas are essential and must be obtained in order to fulfill legal entry requirements. Full definition
Potential interns must be: Able to obtain necessary visas and arrange travel to the duty station. (careerdigital.com)
Necessary visa letter is available online soon after the purchase for proof of coverage at the consulate during visa appointment. (insubuy.com)
However, China has declined to grant necessary visas that would allow the FDA to move forward with more facility inspections. (myvirginiainjurylawyer.com)