Does this violate any laws, ethics, or other professional creed? Does this violate NY law?
Of course it does violate the laws of NY. You are not licensed in NY. You may get the project approved by whomever, but you are committing a felony by practicing engineering without a license. There are no exemptions for federal projects. In most other states, this is only a misdemeanor crime.
The person accepting your MI PE license does not have the authority to permit you to practice engineering in NY. That is up to the State of NY and is a separate matter. Sure your project has been approved, but you are breaking the law. It's the same as speeding down the street when no cop is present. However, unlike the speeder, you are leaving evidence - your MI PE license.
If someone gets mad at you for whatever, they can report you to the State of NY. You should follow up and get the NY P.E.
Here are relevant passages of NY laws:
"Any use of the title "Professional Engineer" or provision of professional engineering services within New York State requires licensure, except in certain "exempt" settings. These settings are detailed in Section 7208 of the Education Law."
"§7202. Practice of engineering and use of title "professional engineer". Only a person licensed or otherwise authorized under this article shall practice engineering or use the title "professional engineer"."
1. In New York State, who can practice professional engineering?
Section 7202 of the New York State Education Law states that, "Only a person licensed or otherwise authorized under this article shall practice engineering or use the title 'professional engineer'...." A "person licensed" is an individual that has qualified by education, experience and examination and has been issued a New York State professional engineering license by the State Education Department.
"11. What are the consequences of someone engaging in unlicensed or unauthorized practice?
The laws of the State are clear in regard to unauthorized practice. Section 6512.1 of the Education Law makes it a class E felony for anyone not authorized to practice who practices or offers to practice or holds himself out as being able to practice professional engineering. Section 6509 defines professional misconduct as, among other things, permitting, aiding or abetting an unlicensed person to perform activities requiring a license; and, section 6512.2 makes it a class E felony for anyone, including a public official, to knowingly aid or abet three or more unlicensed persons practice a profession requiring a license."