Block level elements print a leading line break before the block and and a trailing line break after the block. This results in double line spacing between block level elements.  However, a block level element which is the first element after the HTML element does not print a leading line break.  Another execption is that a CENTER element never prints a leading line break resulting in single line spacing between a CENTER element and the preceding block level element.  A block level element may not be nested within another block level element.  If a block level element is not terminated by an ending tag and another block level element is encountered, then the termination of the first block level element is implied and a trailing line break is printed.

1. A CENTER element should only perform a leading line break if the position of the CENTER element is not at the left margin of the field.  In other words, if a CENTER element is preceded by a BR tag or a closing tag of any other block level element (such as </P>) which forces a line break, the CENTER element should not perform an leading line break since the previous block was explicitly terminated resulting in a line break.