Evaluate the accuracy of the following jurisprudential declarations attributed specifically to the original Kesavananda Bharati judgment of 1973:
1. The judicial bench definitively ruled that the introductory Preamble constitutes an integral, legal part of the Constitution.
2. The judicial bench overruled previous precedent, affirming Parliament's sovereign authority to abridge or take away Fundamental Rights.
3. The judicial bench explicitly formulated and introduced the foundational doctrine of the 'basic structure'.
4. The judicial bench explicitly decreed that its newly formed doctrine would apply retroactively to any amendment enacted after April 24, 1973.