How do I check to see if the round has started?

[Galactic]

Strip weapon causes a problem in preround on my TTT server. how would I check to see if the round has started before stripping. Here is an example of the code I am using. (it's for pointshop)

ITEM.Name = 'Improver'
ITEM.Price = 50000
ITEM.Model = 'models/props_c17/SuitCase_Passenger_Physics.mdl'
ITEM.Bone = 'ValveBiped.Bip01_Spine2'

function ITEM:OnEquip(ply, modifications)
	ply:PS_AddClientsideModel(self.ID)
end

function ITEM:OnHolster(ply)
	ply.CanChange = false
	ply:PS_RemoveClientsideModel(self.ID)
end

function ITEM:ModifyClientsideModel(ply, model, pos, ang)
	model:SetModelScale(0.8, 0)
	pos = pos + (ang:Right() * 5) + (ang:Up() * 6) + (ang:Forward() * 2)
	
	return model, pos, ang
end

function ITEM:Think(ply, modifications)
   if ply.CanChange == true then

	if ply:HasWeapon( 'weapon_ttt_flaregun' ) then
	ply:PrintMessage(HUD_PRINTTALK, "beep")
		ply:StripWeapon('weapon_ttt_flaregun')
	ply:PrintMessage(HUD_PRINTTALK, "boop")
		ply:Give('dragon')
	ply:PrintMessage(HUD_PRINTTALK, "WEAPON UPGRADED")
--		ply:SelectWeapon('dragon')
--	ply:PrintMessage(HUD_PRINTTALK, "Selected")
	end
  end
end

[Nookyava]

[url]https://github.com/garrynewman/garrysmod/blob/64242f4ecd2d0f7d29e36caa4c1d727cb6ff00d9/garrysmod/gamemodes/terrortown/gamemode/cl_init.lua#L97[/url]