public function registration($request) {
		$id = $request->param('ID');
		if (!ctype_digit($id)) {
			return $this->httpError(404);
		}
		$rego = EventRegistration::get()->byID($id);
		if (!$rego || $rego->EventID != $this->ID) {
			return $this->httpError(404);
		}
		$request->shift();
		$request->shiftAllParams();

		return new EventRegistrationDetailsController($this, $rego);
	}