rts/PEi386: Mysterious handling of bss section

While looking at !7384 (closed) I noticed an extremely suspicious bit of logic in ocVerifyImage_PEi386:

   /* Initialize the last section's info field which contains the .bss
      section, it doesn't need an info so set it to NULL.  */
  sections[info->numberOfSections].info = NULL;

I have several questions:

• where is it written that the bss section must be last?
• why should it not have a valid info field?
• didn't we just leak the info struct that the loop previously allocated for this section?