To install a 3 x 17 elec. Message ctr. Ground sign for national college. This sign must be approve by mpc (sp) requirements before issuance of this permit. ---signs with any copy, graphics, or digital displays that change messages by electronic or mechanical means, must remain fixed for a min of 8 seconds.. -- the copy, graphics, or digital display shall remain fixed, static, motionless, and nonflashing for a period of eight (8) seconds with all copy changes occurring instantaneously without any special effects. Need to comply with pc approved plan..