But that is not to say that there is any inherent incompatibility between a conviction under s. 5 (6) and the release of the convicted person on his or her giving security to be of good behaviour and to comply with any other conditions imposed by the court. It may well happen that, by reason of his personal characteristics, state of health or other circumstances the court considers it undesirable to send him or her to gaol, and yet that the court is satisfied that all practical considerations in relation to deportation will be fully met if security is taken that the person will report periodically to the immigration authorities, or will remain in a specified area, or will perform other conditions ensuring his or her instant availability if deportation is ordered, and will be well-behaved while the question of deportation is being considered. It is true that the ancient power of magistrates to bind over to be of good behaviour "all them that be not of good fame" required for its exercise some "cause of scandal", some conduct which was contra bonos mores if not actually contra pacem: Blackstone's Commentaries on the Laws of England, 15th ed. (1809), vol. 4, p. 256; R. v. Sandbach; Ex parte Williams [1] . It was a power to oblige those persons whom there was a probable ground to suspect of future misbehaviour "to give full assurance to the public, that such offence as is apprehended shall not happen": Blackstone's Commentaries on the Laws of England, 15th ed. (1809), vol. 4, p. 251. It is not to be supposed that a conviction under s. 5 (6) of the Immigration Act would provide an occasion for the exercise of that power. But the power conferred by s. 20 of the Crimes Act is not similarly conditioned. It arises, according to the express terms of the section, whenever a person is convicted of an offence against the law of the Commonwealth; and it is obvious that by no means all such offences give cause for apprehension of future misbehaviour. The fact, therefore, that a conviction under s. 5 (6) does not necessarily betoken any wrongdoing affords no ground for treating s. 20 as inapplicable. Nor should I regard that section as inapplicable because of an apprehension, which the learned judges of the Supreme Court appear to have felt, that a bond to be of good behaviour would oblige a person, convicted under s. 5 (6) by reason of having failed to pass a dictation test under s. 5 (2), not to continue to commit or repeat the "offence". The obligation of such a bond is against actual misbehaviour: Blackstone's Commentaries on the Laws of England, 15th ed. (1809), vol. 4, pp. 255, 257; Lansbury v. Riley [2] . Their Honours suggested that there would be no method, short of leaving the Commonwealth, whereby an "offender" convicted under s. 5 (6), if he were to give security for good behaviour, would cease to continue committing the "offence" of which he had been convicted. That is true; but, with respect, I cannot think that it throws any light upon the present problem. It does not mean that the conditions of the bond would be broken automatically, for it has never been held, so far as I can find, that a bond to be of good behaviour may be broken by doing nothing at all.