§ 2805 Effective date This act shall take effect September first, nineteen hundred sixty-seven

This rule simply states when the law went into effect. The Surrogate's Court Procedure Act became active on September 1, 1967.

There's nothing more to it than that. This type of rule is common in legal codes. It tells courts, lawyers, and the public the exact date a set of rules starts applying, so everyone knows which rules govern their case based on timing.