1106.1 (B) Works That May Be Registered with this Option
This option may be used to register the following types of unpublished works:
• Individual works.
• Joint works.
• Derivative works.
37 C.F.R. § 202.4 (C) (3).
By contrast, this option cannot be used to register the following works, because they contain multiple works of authorship or because claims involving these types of works are too complex for this option:
• Compilations.
• Collective works.
• Databases.
• Websites.
• Architectural works.
• Secure tests.
Id. §§ 202.4 (C) (3), 202.11 (C) (2), 202.13 (C) (1).