Public Trust organization validation: is a newly registered single-member Florida LLC eligible, or is a three-year history required?

I am preparing to set up Artifact Signing to sign a Windows desktop application and its native DLL components. Before I register a legal entity and pay for a subscription, I want a definitive answer on eligibility, because the published material conflicts and the rejection reasons are not shown to the applicant.

My situation:

• United States, Florida.
• I would register a new single-member LLC specifically for this, so it would be days old at the time of validation.
• I own the domain the application is distributed from, and I can provide primary and secondary email addresses on that domain.
• I can provide the EIN, the registered business address and the Sunbiz registration.

My questions:

1. Does Public Trust organization identity validation currently require a verifiable tax or business history of three or more years? The MSIX signing overview states this requirement. The Artifact Signing quickstart does not mention it. Which one applies to a request submitted today?
2. If a three-year history is required, is there any alternative evidence that satisfies it for a newly registered entity, for example a D-U-N-S number or notarized documentation?
3. If I instead use Public Trust individual identity validation, I understand the legal name from the billing account appears on the certificate. Can an individual later move to organization validation under the same Artifact Signing account, and do previously signed and timestamped binaries remain valid after that change?
4. Is there any eligibility difference for a single-member LLC compared with a multi-member LLC or a corporation?

I am asking before registering the entity so that I do not pay state filing fees for an application that cannot pass. A direct yes or no on question 1 is what I need most.