bemicro MAX 10 board time constraint

[Altera_Forum]

am working on adding the SLS SD/eMMC card adapter to my BEMICRO MAX 10 board, the tutorial was originally written for cyclone III... Was wondering if anyone knew if the timings had to change 

heres a shot of the PDF  http://www.alteraforum.com/forum/attachment.php?attachmentid=11746&stc=1   the .sdc code reads in the pdf  create_clock -name osc_clock -period 20.833 [get_ports osc_clk] derive_pll_clocks derive_clock_uncertainty   is this right ?

[Altera_Forum]

Is the frequency of the clock driven into the BeMicro board's 'osc_clk' pin the same as it was on the Cyclone III solution? - i.e. 48MHz. If so, the constraints look fine. 

 Cheers, Alex