Eventbrite Ticket form positioning.php

<?php
/**
 * Change the position of the Eventbrite Tickets ticket form (within single event pages).
 */
function change_eventbrite_ticket_position() {
	// Do nothing if Eventbrite Tickets is not active
	if ( ! class_exists( 'Event_Tickets_PRO' ) ) return;

	// Get a reference to the callback method responsible for displaying the ticket form
	$display_tickets = array( Event_Tickets_PRO::instance(), 'print_ticket_form' );

	// First let's unhook it so it no longer displays in it's original position
	remove_action( 'tribe_events_single_event_after_the_meta', $display_tickets , 9 );

	// Now let's hook it up again, but we'll use a different action so it displays in a new position
	add_action( 'tribe_events_single_event_before_the_content', $display_tickets );
}

add_action( 'init', 'change_eventbrite_ticket_position' );

Updated the $display_tickets callback for compatibility with Eventbrite Tickets 3.9.6.