And in 2012, Mr Putin signed a law making it compulsory for them to report their spending as well.

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First, it will become compulsory for sex offenders to report to the authorities before travelling abroad for even one day - the limit is currently three days.

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He added that he personally would favour making history compulsory to 16, but the report notes that this would require an extra 10, 000 history teachers.

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In a British media report Thursday, Siegel warned the group would probably have to impose compulsory layoffs.

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However the Department for Education responded to the QCA report by saying it has "no plans at present" to make languages compulsory in primary school.

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