DBM V 3.0 Official Clarifications
Moving into contact with enemy (21/6/00)

Moving an element's front edge into contact with any part of an enemy element counts as initiating close combat, even if the enemy element is already in combat. Moving into an overlap position does not.

The only situation in which an element can make a move (other than an outcome move) such that its front edge contacts an enemy other than properly lined up (after any forced pivot/shift by the enemy) is when another element in the same moving group does make a legal contact - as per Figure 7.

Diagrams drawn to 15mm scale, all dimensions in "mm" unless otherwise specified.
Element Z is within range to contact an enemy group.	To move into front edge to corner contact with X will not initiate combat, therefore the contact is illegal.
To legally contact X, element Z must line up frontally or on the flank.

There is an exception to the above example involving Skirmishers which conform when contact on  corners by a larger group, refer to Conforming Skirmishers