From the NannyMUD documentation

LAST CHANGE

2001-08-12

FUNCTION

NAME
        block_changed_alignment_hook - 


AVAILABILITY
	/obj/player

DESCRIPTION
	This function is called before the alignment is changed. If
	it returns non-zero, the alignment is not changed.

	ARGUMENTS

	block_changed_alignment_hook(
	  ({ Alignment change,
	     Old alignment,
	     he object doing the change
	  }),
	  the player
	)


NOTE
	The object doing the change might be zero. Be sure to check
	everything thorougly.


SEE ALSO
        block_changed_alignment_hook in hooks/block_changed_alignment_hook