Thank you for the fast reply.
I was confused because my wife is also applying for WP at Canadian embassy in Vienna. For working permit, on embassy site, there is more detailed Document Checklist than the original one (IMM 5488). They ask to submit the one from embassy site instead of IMM 5488.
In that checklist the following text is written for IMM 5257 - Schedule 1:
Schedule 1 - Application for a Temporary Resident Visa Made Outside of Canada [IMM 5257 - Schedule 1] must be completed, dated and signed if one of these options applies to you:
- You are a citizen of Afghanistan, Bosnia-Herzegovina, Iran, Iraq, Kosovo, Lebanon, Libya, Macedonia, Montenegro, Pakistan, Rwanda, Kingdom of Saudi Arabia, Serbia, Somalia, Sudan, Syria, Yemen.
- You are holder of a travel document issued by the Palestinian Authority.
- When filling out the application form you answered "Yes" to any one of questions 3 to 7 in the section "Background Information".
I suppose that the text "must be completed, dated and signed" is from the period when that form had signature line and date box (three years ago when I applied for TRV I had to complete that form by hand and it contained signature line and date box).