While a single "official" PDF can be elusive due to various regional translations, you can find high-quality content and digital versions through the following authoritative repositories:
As a Kalpa Sutra text, it is meant to be learned under a qualified priest (Vadhyar) , not self-administered from a PDF. The PDF is best used for study or reference alongside a live ritual. vivaha chandrika pdf link
A standard manuscript typically contains: While a single "official" PDF can be elusive