Chapter 2 mentions sixteen rituals. What does it say about the 'Upanayanam' or sacred thread ceremony?

While the text from Chapter 2 does state that there are sixteen rituals for the body from birth to death, it does not provide a list or describe any of them besides one. The provided excerpts do not mention the 'Upanayanam' or sacred thread ceremony at all. The only ritual explicitly named in Chapter 2 is the "naming ceremony" (Namakaran). This is mentioned specifically to set the stage for the author's story about how he came to be known as Hemadpant, which he promises to tell the listeners to satisfy their curiosity.