You can use lasting to describe a situation, result, or agreement that continues to exist or have an effect for a very long time.

Has a lasting effect or affect?

effect. Affect is usually a verb, and it means to impact or change. Effect is usually a noun, an effect is the result of a change. Watch out!

What is an example of a lasting impact?

An outcome is the long-lasting impact. They're so warm and their music has had such long-lasting impact. He had a long-lasting impact on the development and practice of forensic psychiatry, psychology and law.