Lines 1863-1868:

>   ;For name="REV"
>   param        = ["VALUE" =" "date-time"]
>        ; Only value parameters allowed. Values are case insensitive.
>
>   param        =/ "VALUE" =" "date"
>        ; Only value parameters allowed. Values are case insensitive.

"VALUE" =" should be "VALUE" "="

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Lines

According to section 3.4.1, the TZ type uses the utc-offset-value by default,
but can be reset to use the text type (see example on lines 885-886).

The ABNF in section 4 disallows this (lines 1766-1771):

>   ;For name="TZ"
>   param        = ""
>        ; No parameters allowed
>
>   value        = utc-offset-value

If the description and example in section 3.4.1 is intended behavior, this
should probably read

>   ;For name="TZ"
>   param        = tz-utc-offset-param
>
>   param        =/ tz-text-param
>
>   value        = tz-utc-offset-value
>       ; Value and parameter MUST match
>
>   value        =/ tz-text-value
>       ; Value and parameter MUST match
>
>   tz-utc-offset-param = ""
>       ; No parameters allowed
>
>   tz-text-param = "VALUE" "=" "text"
>
>   tz-utc-offset-value = utc-offset-value
>
>   tz-text-value = text-value