Evaluate the structural characteristics and defined scope of application regarding Part IV of the Indian Constitution:
1. The primary constitutional text explicitly classifies the enumerated directives into three distinct ideological chapters: Socialistic, Gandhian, and Liberal-Intellectual.
2. The overarching ideals embedded within the directives are intended solely as guidance for the central executive, exempting state-level legislatures from compliance.
3. The constitutional definition of the 'State' obligated to keep these principles in mind encompasses central, provincial, and all localized public authorities.