Note: This is not an answer to the question, but rather an explanation as to why there can ever be no such authorities to standardize any form of traditions or customs, based on a broader view of ever-changing nature of everything.
From a broader perspective, taking into account the evolution of early Indic religions to the present forms of Hinduism and other schools like Jainism, the procedure of rituals (Puja) and sacrifices (Yajna) have always been subject to change. Each school/sect of contemporary Hindu religion claims and prioritizes its own flavour and mix of customs and traditions which has been shaped to its present form over the course of centuries.
There is no single authoritarian school which can claim the complete authority of any set of universal standardized (Vedic) rituals and sacrifices. In fact, there are even sects which have few contradictory forms of dharmic rituals who claim themselves to be the absolutely right one.
To give a historical perspective, the contemporary or even classical forms of Hinduism have diverged a lot from the actual oldest forms of Vedic religion which started flourishing roughly from 2000 BC, right from the beginning of Aryan Migration into the Indo sub-continent who brought in the Proto-Vedic religion. A lot of changes in culture and religion have occurred since then, with rise and fall of different schools of Indo-religions.
For example, see: The changing nature of Vedic offerings
To briefly give my (opinionated) answer to your question, it is better if one focuses only on the true duties at hand pertaining to his job, society and family (& friends) rather than any acts of pleasing any Devas or dead ancestors.
Quoting a related verse from Bhagavat Gita:
यामिमां पुष्पितां वाचं प्रवदन्त्यविपश्चित: ।
वेदवादरता: पार्थ नान्यदस्तीति वादिन: ॥2.42॥
कामात्मान: स्वर्गपरा जन्मकर्मफलप्रदाम् ।
क्रियाविशेषबहुलां भोगैश्वर्यगतिं प्रति ॥2.43॥
Men of small knowledge are very much attached to the flowery words of the Vedas, which recommend various fruitive activities for elevation to heavenly planets, resultant good birth, power, and so forth. Being desirous of sense gratification and opulent life, they say that there is nothing more than this.